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/api/deps.py

@@ -1,7 +1,8 @@
 from sqlalchemy.ext.asyncio import AsyncSession
-from app.services.crawl_service import CrawlService
-from app.crawler.gxgp_spider import GXGPSpider
+
 from app.crawler.dahuagov_spider import DahuagovSpider
+from app.crawler.gxgp_spider import GXGPSpider
+from app.services.crawl_service import CrawlService
 
 
 async def get_db() -> AsyncSession: