- replace interface{} with any across ~30 files for Go 1.18+ style
- adopt for-range-over-int loops in place of explicit index loops
- use maps.Copy from stdlib to replace manual map copy loops
- use min() builtin for exponential backoff delay cap in retry_manager
- add MongoDB 7.0 K8s manifests (StatefulSet, Service, PVC, Secret)
- document PostgreSQL and MongoDB deploy steps in deploy.md with SSH tunnel port mappings
- rename TaskParams interface to Params in task/base_task.go for brevity - remove debug fmt.Println/Printf statements from graph.go and handler_factory.go
- fix is_local flag from false to true for existing test components in deploy.md - add 6 new test component records (ns4-ns8) to deploy seed data
- fix params lost in RabbitMQ transit by threading them through PublishTask/PublishTaskWithRetry
- fix UpdateTaskErrorInfo not setting status=FAILED on async_task
- fix UpdateAsyncTaskResultWithError silently skipping when no result row exists (UPDATE → upsert)
- sync task failure to async_task_result in updateTaskWithError
- remove taskType from AsyncTaskHandler.Execute interface; rename TaskHandler → AsyncTaskHandler
- replace CompositeHandler with direct factory.GetHandler dispatch via worker.dispatch()
- use constructors (NewXxxHandler) for handler registration instead of zero-value literals
- consolidate TaskType/TaskStatus/UnifiedTaskType into task/types.go; delete types_v2.go
- extract BaseTask/TaskParams into task/base_task.go
douxu