refactor(exceptions): add ruff BLE001; convert 103 broad except Exception

Per CONVENTIONS.md Part 2 ("Never bare except") and CONVENTIONS.md
Part 7 (pre-commit hooks: ruff), blind `except Exception` is now a
lint failure. Pre-existing sites are marked `# noqa: BLE001` for
later manual review; new code must use specific exception types.

Changes:
- pyproject.toml: added "BLE" to ruff lint select. BLE001 is now enforced
- 103 of 166 `except Exception` sites were auto-converted to specific
  types based on context (httpx, json, OSError, subprocess, etc.)
- 62 remaining sites marked with `# noqa: BLE001` for later review
  (mostly generic try/except wrappers that legitimately need broad catch
  for graceful degradation: e.g. compliance LLM fallback must catch
  any error to preserve the regex result)
- 1 manual fix: reverted compliance.py LLM fallback to broad except
  with explicit "must catch all errors" comment + noqa
- 2 files (commerce_sync.py, crm_sync.py) needed `import httpx` added
  so the auto-converted exception references would resolve
- 5 source files (agency, monitor, pipelines, auth_connector,
  llm_providers/registry) renamed "name" -> "<scope>_name" in
  extra={...} dicts because "name" is a reserved LogRecord field

Test impact:
- 14 failing tests -> 1 (the SSE subprocess test is a sandbox limitation,
  pre-existing and unrelated)
- New `test_ble_temp.py` verifies BLE001 catches new violations

Follow-up:
- Each `# noqa: BLE001` site should be reviewed and replaced with a
  specific exception type where possible. The most common legitimate
  broad-catch case is the LLM fallback path; everything else probably
  can be narrowed.

email_scraper.py

@@ -240,7 +240,7 @@ async def fetch_gmail_emails(
                 email = _parse_gmail_message(msg_data)
                 if email:
                     emails.append(email)
-            except Exception as e:
+            except (httpx.HTTPError, httpx.RequestError) as e:
                 logger.warning(
                     "gmail_fetch_failed", extra={"msg_id": msg_id, "error": str(e)[:100]}
                 )
@@ -248,7 +248,7 @@ async def fetch_gmail_emails(
 
         return {"success": True, "total": len(emails), "emails": emails}
 
-    except Exception as e:
+    except (httpx.HTTPError, httpx.RequestError) as e:
         return {"success": False, "error": str(e)[:300]}
 
 
@@ -285,7 +285,7 @@ def _get_gmail_body(payload: dict[str, Any]) -> str:
         data = payload["body"]["data"]
         try:
             return base64.urlsafe_b64decode(data).decode("utf-8", errors="replace")
-        except Exception:
+        except Exception:  # noqa: BLE001
             return ""
 
     # Check parts
@@ -295,7 +295,7 @@ def _get_gmail_body(payload: dict[str, Any]) -> str:
             data = part["body"]["data"]
             try:
                 return base64.urlsafe_b64decode(data).decode("utf-8", errors="replace")
-            except Exception:
+            except Exception:  # noqa: BLE001
                 continue
         # Recursive check
         if part.get("parts"):
@@ -366,5 +366,5 @@ async def fetch_outlook_emails(
 
         return {"success": True, "total": len(emails), "emails": emails}
 
-    except Exception as e:
+    except (httpx.HTTPError, httpx.RequestError) as e:
         return {"success": False, "error": str(e)[:300]}