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.

cookie_warmer.py

@@ -102,7 +102,7 @@ class CookieWarmer:
                         await page.wait_for_timeout(random.randint(500, 1500))
                         delay = random.uniform(min_delay, max_delay)
                         await asyncio.sleep(delay)
-                    except Exception as e:
+                    except Exception as e:  # noqa: BLE001
                         logger.warning("warm_page_failed url=%s err=%s", warming_url, str(e)[:50])
 
                 # Collect cookies
@@ -142,7 +142,7 @@ class CookieWarmer:
                 "pages_visited": pages,
                 "expires_at": cookie_data["expires_at"],
             }
-        except Exception as e:
+        except (json.JSONDecodeError, ValueError) as e:
             return {"success": False, "error": str(e)[:300]}
 
     def get_warmed_cookies(self, session_id: str) -> dict[str, Any] | None:
@@ -157,7 +157,7 @@ class CookieWarmer:
             if expires < datetime.now(UTC):
                 return None
             return data
-        except Exception:
+        except (json.JSONDecodeError, ValueError):
             return None
 
     def list_sessions(self) -> list[dict[str, Any]]:
@@ -174,6 +174,6 @@ class CookieWarmer:
                         "cookie_count": len(data.get("cookies", [])),
                     }
                 )
-            except Exception:
+            except (json.JSONDecodeError, ValueError):
                 pass
         return sessions