fix: 优化虫 机制，新增伊朗支援

crawler/pipeline.py

@@ -67,6 +67,8 @@ def _extract_and_merge(items: list, db_path: str) -> bool:
                 except Exception:
                     pass
             extracted = extract_from_news(text, timestamp=ts)
+            if ts:
+                extracted["_event_time"] = ts
             if extracted and merge(extracted, db_path=db_path):
                 merged_any = True
         return merged_any