style(rmi-backend): complete lint cleanup — 1175→0 ruff errors

- Fix 71 invalid-syntax files (class-body newline-broken assignments)
- Add from/None chain to 307 B904 raise-without-from sites
- Add B008 ignore to ruff.toml (already in pyproject.toml)
- Noqa F401 on __init__.py re-exports (137 sites)
- Noqa E402 on deferred imports (63 sites)
- Bulk-add stdlib/FastAPI/project imports for F821 (127 sites)
- Replace ×→x, –→-, …→... in docstrings (4093 chars)
- Manual refactor of 5 SIM103/SIM116 patterns

Tests: 791 passed (66 deselected due to pre-existing Redis issues in test_rag.py)
Co-authored-by: opencode <opencode@rugmunch.io>

app/api/v1/__init__.py

@@ -13,11 +13,11 @@ from __future__ import annotations
 
 from fastapi import APIRouter
 
-# Aggregator list — populated as domains migrate.
+# Aggregator list - populated as domains migrate.
 # Each entry is an APIRouter from app/api/v1/<group>/<domain>.py.
 api_v1_router: list[APIRouter] = []
 
-# Aggregator router — single mount point for v1.
+# Aggregator router - single mount point for v1.
 # When domains migrate, replace this with a real aggregator:
 #     from app.api.v1.public import router as public_router
 #     api_v1_router.append(public_router)
@@ -30,7 +30,7 @@ router = APIRouter(prefix="/api/v1", tags=["v1"])
 #
 # During strangelfig, the LEGACY /api/v1/<domain>/* endpoints remain
 # mounted in main.py. The new v1 router is mounted at the same path
-# (FastAPI handles prefix-based routing) — first match wins, so the
+# (FastAPI handles prefix-based routing) - first match wins, so the
 # legacy stays until we explicitly remove it.
 
 from app.api.v1.auth.alerts import router as alerts_router  # noqa: E402

app/api/v1/admin/__init__.py

@@ -1,4 +1,4 @@
-"""Admin routes — admin role required.
+"""Admin routes - admin role required.
 
 Target: user management, system config, ops, bulletin moderation.
 """

app/api/v1/admin/alerts_webhook.py

@@ -1,4 +1,4 @@
-"""Admin alerts webhook — /api/v1/admin/alerts/webhook.
+"""Admin alerts webhook - /api/v1/admin/alerts/webhook.
 
 Stub endpoint for receiving alert webhooks from external sources
 (monitoring, observability platforms).
@@ -28,5 +28,5 @@ async def receive_alert_webhook(payload: AlertWebhookPayload) -> dict[str, Any]:
     """Receive an alert webhook from external monitoring."""
     raise HTTPException(
         status_code=501,
-        detail="Alert webhook ingestion not yet implemented — pending T08 GlitchTip wiring",
+        detail="Alert webhook ingestion not yet implemented - pending T08 GlitchTip wiring",
     )

app/api/v1/auth/__init__.py

@@ -1,4 +1,4 @@
-"""Authenticated routes — JWT required.
+"""Authenticated routes - JWT required.
 
 Target: portfolio, alerts, intel feeds, profile, settings.
 """

app/api/v1/auth/alerts.py

@@ -1,4 +1,4 @@
-"""Auth alerts router — /api/v1/alerts/*.
+"""Auth alerts router - /api/v1/alerts/*.
 
 Stub implementation for the alerts domain. Real implementations
 will wire up to user-configured alert rules and notification channels
@@ -52,7 +52,7 @@ async def create_alert(rule: AlertRule) -> dict[str, str]:
     """
     raise HTTPException(
         status_code=501,
-        detail="Alert persistence not yet implemented — coming in v5.1",
+        detail="Alert persistence not yet implemented - coming in v5.1",
     )
 
 
@@ -61,5 +61,5 @@ async def delete_alert(rule_id: str) -> dict[str, str]:
     """Delete an alert rule by ID."""
     raise HTTPException(
         status_code=501,
-        detail="Alert persistence not yet implemented — coming in v5.1",
+        detail="Alert persistence not yet implemented - coming in v5.1",
     )

app/api/v1/catalog/__init__.py

@@ -1,4 +1,4 @@
-"""Catalog v1 routes — thin HTTP layer."""
+"""Catalog v1 routes - thin HTTP layer."""
 from .router import router
 
 __all__ = ["router"]

app/api/v1/catalog/router.py

@@ -1,4 +1,4 @@
-"""T27B HTTP routes — CatalogService endpoints.
+"""T27B HTTP routes - CatalogService endpoints.
 
 Per v4.0 §T27. The thin HTTP layer over app.catalog.service.CatalogService.
 """
@@ -66,7 +66,7 @@ async def get_token(chain: str, address: str) -> dict:
     try:
         c = Chain(chain)
     except ValueError:
-        raise HTTPException(400, f"unknown chain: {chain}")
+        raise HTTPException(400, f"unknown chain: {chain}") from None
     tok = await get_catalog().get_token(c, address)
     if not tok:
         raise HTTPException(404, "token not found")
@@ -75,23 +75,23 @@ async def get_token(chain: str, address: str) -> dict:
 
 @router.get("/tokens/{chain}/{address}/risk")
 async def get_token_risk(chain: str, address: str) -> dict:
-    """Recipe 3 — Real-time risk score. Composes Redis + Postgres + Neo4j."""
+    """Recipe 3 - Real-time risk score. Composes Redis + Postgres + Neo4j."""
     try:
         c = Chain(chain)
     except ValueError:
-        raise HTTPException(400, f"unknown chain: {chain}")
+        raise HTTPException(400, f"unknown chain: {chain}") from None
     return await get_catalog().get_token_risk(c, address)
 
 
 @router.post("/tokens/risky-by-deployer")
 async def risky_tokens(req: FindRiskyTokensRequest) -> dict:
-    """Recipe 1 — Find tokens deployed by wallets with rug history."""
+    """Recipe 1 - Find tokens deployed by wallets with rug history."""
     chain_enum = None
     if req.chain:
         try:
             chain_enum = Chain(req.chain)
         except ValueError:
-            raise HTTPException(400, f"unknown chain: {req.chain}")
+            raise HTTPException(400, f"unknown chain: {req.chain}") from None
     tokens = await get_catalog().find_tokens_by_deployer_history(
         min_rug_count=req.min_rug_count, chain=chain_enum, limit=req.limit
     )
@@ -107,7 +107,7 @@ async def get_wallet(chain: str, address: str) -> dict:
     try:
         c = Chain(chain)
     except ValueError:
-        raise HTTPException(400, f"unknown chain: {chain}")
+        raise HTTPException(400, f"unknown chain: {chain}") from None
     w = await get_catalog().get_wallet(c, address)
     if not w:
         raise HTTPException(404, "wallet not found")
@@ -148,7 +148,7 @@ async def attach_rag(chain: str, address: str, req: AttachRagRequest) -> dict:
     try:
         c = Chain(chain)
     except ValueError:
-        raise HTTPException(400, f"unknown chain: {chain}")
+        raise HTTPException(400, f"unknown chain: {chain}") from None
     ok = await get_catalog().attach_rag_to_token(c, address, req.qdrant_point_id)
     if not ok:
         raise HTTPException(404, "token not found or update failed")

app/api/v1/mcp/router.py

@@ -1,4 +1,4 @@
-"""T33 MCP Server — HTTP wrapper for SSE transport.
+"""T33 MCP Server - HTTP wrapper for SSE transport.
 
 Per v4.0 §T33. Endpoints:
   POST /mcp                  JSON-RPC 2.0 endpoint
@@ -68,7 +68,7 @@ async def jsonrpc_handler(req: JsonRpcRequest) -> dict:
                 "serverInfo": {
                     "name": "rugmunch-intelligence",
                     "version": MCP_SERVER_VERSION,
-                    "description": "Crypto intelligence platform — 13+ chains, 8 MCP tools, x402 paid tier",
+                    "description": "Crypto intelligence platform - 13+ chains, 8 MCP tools, x402 paid tier",
                 },
                 "capabilities": {"tools": {}, "resources": {}, "prompts": {}},
             },

app/api/v1/public/__init__.py

@@ -1,4 +1,4 @@
-"""Public routes — no authentication required.
+"""Public routes - no authentication required.
 
 Target: scanner, wallet lookup, token info, pricing, health.
 """

app/api/v1/public/scanner.py

@@ -1,4 +1,4 @@
-"""Public scanner endpoints — /api/v1/scanner/*.
+"""Public scanner endpoints - /api/v1/scanner/*.
 
 Stub for unauthenticated token scans. Real implementation will
 trigger the scanner pipeline (honeypot detection, flash loan checks,
@@ -37,7 +37,7 @@ async def scan(req: ScanRequest) -> ScanResult:
     """Queue a token/wallet scan."""
     raise HTTPException(
         status_code=501,
-        detail="Scanner pipeline not yet wired — uses app.domain.scanner (T06+)",
+        detail="Scanner pipeline not yet wired - uses app.domain.scanner (T06+)",
     )
 
 
@@ -58,5 +58,5 @@ async def quick_scan(
     """Quick scan (free tier, no persistence)."""
     raise HTTPException(
         status_code=501,
-        detail="Quick scan uses cached shield — see caching_shield module",
+        detail="Quick scan uses cached shield - see caching_shield module",
     )

app/api/v1/public/token.py

@@ -1,4 +1,4 @@
-"""Public token endpoints — /api/v1/token/*.
+"""Public token endpoints - /api/v1/token/*.
 
 Stub for unauthenticated token queries. Real implementation will
 fetch token metadata, holders, liquidity, and risk score.
@@ -43,7 +43,7 @@ async def get_token(
     """Fetch basic token metadata."""
     raise HTTPException(
         status_code=501,
-        detail="Token lookup not yet implemented — coming in v5.1",
+        detail="Token lookup not yet implemented - coming in v5.1",
     )
 
 
@@ -52,7 +52,7 @@ async def get_token_risk(address: str, chain: str = "ethereum") -> TokenRisk:
     """Compute the risk score for a token (uses Bayesian reputation + on-chain checks)."""
     raise HTTPException(
         status_code=501,
-        detail="Token risk uses T01 Bayesian + T02 scanner pipeline — pending wiring",
+        detail="Token risk uses T01 Bayesian + T02 scanner pipeline - pending wiring",
     )
 
 
@@ -61,5 +61,5 @@ async def get_token_holders(address: str, chain: str = "ethereum", top: int = 50
     """Return top holders distribution for a token."""
     raise HTTPException(
         status_code=501,
-        detail="Holder distribution not yet implemented — uses Postgres + Neo4j",
+        detail="Holder distribution not yet implemented - uses Postgres + Neo4j",
     )

app/api/v1/public/wallet.py

@@ -1,4 +1,4 @@
-"""Public wallet endpoints — /api/v1/wallet/*.
+"""Public wallet endpoints - /api/v1/wallet/*.
 
 Stub for unauthenticated wallet queries. Real implementation will
 resolve wallets, fetch labels, and return balance/history data.
@@ -35,7 +35,7 @@ async def resolve_wallet(
     """
     raise HTTPException(
         status_code=501,
-        detail="Wallet resolution not yet implemented — coming in v5.1",
+        detail="Wallet resolution not yet implemented - coming in v5.1",
     )
 
 
@@ -44,7 +44,7 @@ async def get_wallet_labels(address: str, chain: str = "ethereum") -> list[dict[
     """Return labels for a wallet from all federated sources."""
     raise HTTPException(
         status_code=501,
-        detail="Federated labels API pending — see T11",
+        detail="Federated labels API pending - see T11",
     )
 
 
@@ -53,5 +53,5 @@ async def get_wallet_history(address: str, chain: str = "ethereum") -> dict[str,
     """Return transaction history summary for a wallet."""
     raise HTTPException(
         status_code=501,
-        detail="Wallet history pending — uses Neo4j + Postgres in v5.1",
+        detail="Wallet history pending - uses Neo4j + Postgres in v5.1",
     )

app/api/v1/rag/search.py

@@ -1,4 +1,4 @@
-"""V1 RAG route — thin HTTP layer over app.rag.
+"""V1 RAG route - thin HTTP layer over app.rag.
 
 The RAG system is the most coupled module (14 legacy files). This
 facade exposes the most-used operations: search, ingest, feedback.

app/api/v1/x402/__init__.py

@@ -1,4 +1,4 @@
-"""x402 paid routes — crypto micropayment gated.
+"""x402 paid routes - crypto micropayment gated.
 
 Target: tools (split from legacy x402_tools.py), tokens, wallets, defi, security.
 """