fix(HEL-386): 清理任务按 ISO 截止时间删除 job_runs/src_calls

YYYYMMDD 与 ISO 字符串比较会把同年保留期内记录全部误删。

Co-authored-by: Cursor <cursoragent@cursor.com>
Co-authored-by: multica-agent <github@multica.ai>

xiaobai-datahub/datahub/pipeline.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 import json
 import time
 from collections.abc import Callable
+from datetime import timedelta
 from typing import Any
 
 from datahub.adapters.base import AdapterError
@@ -342,8 +343,9 @@ class Pipeline:
     def cleanup(self) -> dict[str, int]:
         staging_days = int(self.settings.quality.get("staging_retain_days") or 14)
         job_days = int(self.settings.quality.get("job_run_retain_days") or 90)
-        cutoff_staging = add_days(yyyymmdd(self.clock()), -staging_days)
-        cutoff_jobs = add_days(yyyymmdd(self.clock()), -job_days)
+        now = now_shanghai(self.clock())
+        cutoff_staging = add_days(yyyymmdd(now), -staging_days)
+        cutoff_jobs = isoformat(now - timedelta(days=job_days))
         deleted = 0
         with self.db.write() as connection:
             for dataset, (_eod, staging) in DATASET_TABLES.items():