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/wallet_memory/engine.py

@@ -1,5 +1,5 @@
 """
-Wallet Memory Engine — Orchestrator for the Wallet Memory Bank.
+Wallet Memory Engine - Orchestrator for the Wallet Memory Bank.
 ================================================================
 Single entry point for all wallet intelligence queries. Combines:
   - Storage (ClickHouse + Redis)
@@ -9,9 +9,9 @@ Single entry point for all wallet intelligence queries. Combines:
   - Entity resolution (cross-chain linking)
 
 Primary API:
-  get_deployer_intelligence(address, chain) — what SENTINEL calls
-  get_wallet_profile(address, chain) — what WalletSafe frontend calls
-  flag_deployer(address, chain, reason) — the data flywheel from scans
+  get_deployer_intelligence(address, chain) - what SENTINEL calls
+  get_wallet_profile(address, chain) - what WalletSafe frontend calls
+  flag_deployer(address, chain, reason) - the data flywheel from scans
 """
 
 import logging