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.

proxy_manager.py

@@ -303,7 +303,7 @@ class ProxyManager:
                     "ip": r.text[:100] if r.is_success else "",
                     "status": r.status_code,
                 }
-        except Exception as e:
+        except (httpx.HTTPError, httpx.RequestError) as e:
             return {"working": False, "error": str(e)[:100]}
 
     def needs_premium_proxy(self, last_error: str) -> bool:
@@ -337,7 +337,7 @@ class ProxyManager:
                 source="proxy_manager",
                 user_id=os.getenv("USER", ""),
             )
-        except Exception as e:
+        except Exception as e:  # noqa: BLE001
             logger.debug("referral_track_failed", extra={"error": str(e)[:80]})
         return provider["signup_url"]
 
@@ -444,7 +444,7 @@ class ProxyManager:
                 source="proxy_signup",
                 user_id=user_id,
             )
-        except Exception as e:
+        except Exception as e:  # noqa: BLE001
             logger.debug("referral_record_failed", extra={"error": str(e)[:80]})
         return ""
 
@@ -461,7 +461,7 @@ class ProxyManager:
                 if c.get("source", "").startswith("proxy")
                 and _parse_ts(c.get("timestamp", "")) >= cutoff
             ]
-        except Exception as e:
+        except Exception as e:  # noqa: BLE001
             logger.debug("recent_clicks_failed", extra={"error": str(e)[:80]})
             return []