fix: 修复 filter_by_date 类型处理 + _save_to_db rowcount 0 值 bug

app/services/pipeline.py

@@ -1,6 +1,6 @@
 from typing import Any, Dict, List
 from app.crawler.base import PipelineConfig, PipelineResult
-from app.services.filter_service import filter_by_keywords, dedup_by_hash
+from app.services.filter_service import dedup_by_hash
 
 
 class PostCrawlPipeline:
@@ -74,7 +74,7 @@ class PostCrawlPipeline:
 
         result_proxy = await self.db.execute(stmt)
         await self.db.commit()
-        return result_proxy.rowcount or len(values)
+        return result_proxy.rowcount if result_proxy.rowcount >= 0 else len(values)
 
     async def _send_notifications(self, announcements: List[Dict[str, Any]]) -> int:
         return await self.notify.send(announcements)