feat(memory): propagate temporal validity fields through extraction pipeline

- Add valid_at/invalid_at passthrough in triplet extraction prompt (both zh/en)
- Propagate temporal_validity to EntityEntityEdge in ExtractionOrchestrator
- Use coalesce() for valid_at/invalid_at in Neo4j cypher queries to handle NULLs
- Fix workspace_id/config_id UUID parsing in read_memory config resolution
- Downgrade verbose extraction pipeline logs from info to debug
- Remove UUID and short API key patterns from sensitive filter to reduce false positives
- Standardize log message format (use = spacing, end_user_id label)
- Fix misindented TODO comment in write_pipeline.py

api/app/tasks.py

@@ -1279,7 +1279,7 @@ def write_message_task(
         with get_db_context() as db:
             logger.info(
                 f"[CELERY WRITE] Executing MemoryAgentService.write_memory "
-                f"with config_id={actual_config_id} (type: {type(actual_config_id).__name__}), language={language}")
+                f"with config_id = {actual_config_id} (type: {type(actual_config_id).__name__}), language={language}")
             service = MemoryAgentService()
             result = await service.write_memory(
                 WriteMemoryRequest(