feat(celery): add comprehensive logging to worker and write task

- Initialize logging system in Celery worker entry point with LoggingConfig
- Add logger instance and startup message to celery_worker.py
- Reorganize imports in tasks.py for better readability and consistency
- Add detailed logging to write_message_task for debugging and monitoring
- Log task start with group_id, config_id, and storage_type parameters
- Log service execution and completion status with results
- Add exception handling with error logging and stack trace capture
- Log task completion time and Celery task ID for performance tracking
- Improves observability and troubleshooting of async task execution

api/app/celery_worker.py

@@ -3,6 +3,12 @@ Celery Worker 入口点
 用于启动 Celery Worker: celery -A app.celery_worker worker --loglevel=info
 """
 from app.celery_app import celery_app
+from app.core.logging_config import LoggingConfig, get_logger
+
+# Initialize logging system for Celery worker
+LoggingConfig.setup_logging()
+logger = get_logger(__name__)
+logger.info("Celery worker logging initialized")
 
 # 导入任务模块以注册任务
 import app.tasks