chore: add warnings to silent except Exception blocks (#3212)

* log(app): add warnings to silent except Exception blocks

- Internal tool auth header failure now logs a warning instead of
  silently passing, making auth bypass easier to spot in logs.
- Token last_used_at update failure now logs at DEBUG (fire-and-forget,
  non-critical, but useful when debugging token tracking issues).
- Image ownership verification failure now logs a warning so unexpected
  access-check errors surface instead of silently allowing the request.

* log(chat_routes): add warnings to silent except Exception blocks

- clear_orphaned_session_endpoint: log before rollback so failures
  appear in traces when users see stale/deleted model options.
- _endpoint_has_model (JSON parse): log malformed cached_models instead
  of silently treating endpoint as valid.
- _has_any_visible_model (JSON parse): log malformed cached_models
  instead of silently returning empty list.
- timezone header parse: log failure so time-zone-related tool bugs
  (wrong scheduled times, calendar events) are traceable.
- attachments JSON parse: log failure so silently-dropped attachments
  are visible in server logs.

* log(email_routes): add warnings to silent except Exception blocks

- Email alias resolution failure now logs a warning instead of silently
  returning an empty list, making broken account configs diagnosable.

* log(document_routes): add warnings to silent except Exception blocks

- Export ZIP request body parse failure now logs a warning so empty
  exports caused by malformed requests are diagnosable.
- clear_active_document failure on detach now logs a warning to help
  trace doc re-injection bugs like #1160.

* log(agent_loop): add warnings to silent except Exception blocks

- builtin tool overrides load failure now logs a warning so misconfigured
  settings don't silently fall back to defaults without a trace.
- Timezone context injection failure now logs a warning to help debug
  incorrect scheduled times in agent-created tasks.
- PDF form-backed document detection failure now logs a warning so
  broken form-doc UI is traceable to the root cause.

* log(llm_core): add warnings to silent except Exception blocks

- Malformed URL in _is_ollama_native_url now logs a warning so bad
  endpoint configs are traceable instead of silently returning False.
- Model list fetch failure now logs a warning with the endpoint URL so
  endpoints that silently vanish from the model picker are diagnosable.

* log: pass exception via exc_info instead of string interpolation

* fix(logging): avoid logging raw URLs in llm_core error paths

Drop the raw url/base_chat_url from the Ollama-detection and
model-list-fetch warning logs added by this sweep, since these values
can contain private hostnames, internal IPs, credentials, or other
deployment details.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

routes/document_routes.py

@@ -503,7 +503,8 @@ def setup_document_routes(session_manager, upload_handler=None) -> APIRouter:
         user = get_current_user(request)
         try:
             data = await request.json()
-        except Exception:
+        except Exception as e:
+            logger.warning("Failed to parse export request body, defaulting to empty", exc_info=e)
             data = {}
         ids = data.get("ids") or []
         if not ids:
@@ -645,8 +646,8 @@ def setup_document_routes(session_manager, upload_handler=None) -> APIRouter:
                     try:
                         from src.agent_tools.document_tools import clear_active_document
                         clear_active_document(doc_id)
-                    except Exception:
-                        pass
+                    except Exception as e:
+                        logger.warning("Failed to clear active document %r on detach", doc_id, exc_info=e)
             db.commit()
             db.refresh(doc)
             return _doc_to_dict(doc)