chore: ruff 代码检查与修复

130 issues auto-fixed (import ordering, UP045/UP006 type annotations),
33 issues manually fixed (E712/E501/E402/E722 + N818 rename + per-file
wechat ignore for N8xx naming conventions). All 33 tests pass.

app/services/pipeline.py

@@ -1,4 +1,5 @@
-from typing import Any, Dict, List
+from typing import Any
+
 from app.crawler.base import PipelineConfig, PipelineResult
 from app.services.filter_service import dedup_by_hash
 
@@ -8,7 +9,7 @@ class PostCrawlPipeline:
         self.db = db_session
         self.notify = notification_service
 
-    async def process(self, announcements: List[Dict[str, Any]],
+    async def process(self, announcements: list[dict[str, Any]],
                       config: PipelineConfig) -> PipelineResult:
         result = PipelineResult()
 
@@ -47,8 +48,9 @@ class PostCrawlPipeline:
 
         return result
 
-    async def _save_to_db(self, announcements: List[Dict[str, Any]]) -> int:
+    async def _save_to_db(self, announcements: list[dict[str, Any]]) -> int:
         from sqlalchemy.dialects.postgresql import insert
+
         from app.models.announcement import Announcement
 
         if not announcements:
@@ -76,13 +78,14 @@ class PostCrawlPipeline:
         await self.db.commit()
         return result_proxy.rowcount if result_proxy.rowcount >= 0 else len(values)
 
-    async def _send_notifications(self, announcements: List[Dict[str, Any]]) -> int:
+    async def _send_notifications(self, announcements: list[dict[str, Any]]) -> int:
         return await self.notify.send(announcements)
 
-    async def _mark_sent(self, announcements: List[Dict[str, Any]]) -> int:
-        from app.models.announcement import Announcement
+    async def _mark_sent(self, announcements: list[dict[str, Any]]) -> int:
         from sqlalchemy import update
 
+        from app.models.announcement import Announcement
+
         hashes = [a["content_hash"] for a in announcements if a.get("content_hash")]
         if not hashes:
             return 0
@@ -97,6 +100,6 @@ class PostCrawlPipeline:
         return result.rowcount
 
     @staticmethod
-    def _match_keywords(announcement: Dict[str, Any], keywords: List[str]) -> bool:
+    def _match_keywords(announcement: dict[str, Any], keywords: list[str]) -> bool:
         text = f"{announcement.get('title', '')} {announcement.get('purchase_name', '')}"
         return any(kw in text for kw in keywords)