fix: 连接 Pipeline 到爬取流程 + 夜间跳过 + 断网恢复

- CrawlService.run_spider 现在自动调用 PostCrawlPipeline（爬取→存储→筛选→去重→推送）
- 定时任务添加 22:00-06:00 夜间跳过逻辑
- 断网恢复后不会漏公告：爬虫每次从 API 按日期倒序抓取，未推送的公告下次自动补推
- Pipeline 的 _exclude_sent + mark_sent 防止重复推送

tests/test_services/test_crawl_service.py

@@ -1,3 +1,4 @@
+from unittest.mock import AsyncMock
 
 import pytest
 
@@ -49,9 +50,16 @@ class MockDahuagovSpider(BaseSpider):
         )
 
 
+def _make_service():
+    return CrawlService(
+        db_session_factory=AsyncMock(),
+        notification_service=AsyncMock(),
+    )
+
+
 @pytest.mark.asyncio
 async def test_crawl_service_registers_spiders():
-    service = CrawlService()
+    service = _make_service()
     service.register(MockGXGPSpider())
     service.register(MockDahuagovSpider())
     assert len(service.spiders) == 2
@@ -59,7 +67,7 @@ async def test_crawl_service_registers_spiders():
 
 @pytest.mark.asyncio
 async def test_crawl_service_run_all():
-    service = CrawlService()
+    service = _make_service()
     service.register(MockGXGPSpider())
     service.register(MockDahuagovSpider())
     results = await service.run_all()
@@ -71,7 +79,7 @@ async def test_crawl_service_run_all():
 
 @pytest.mark.asyncio
 async def test_crawl_service_run_specific():
-    service = CrawlService()
+    service = _make_service()
     service.register(MockGXGPSpider())
     service.register(MockDahuagovSpider())
     results = await service.run_spider("mock_dahuagov")
@@ -81,7 +89,7 @@ async def test_crawl_service_run_specific():
 
 @pytest.mark.asyncio
 async def test_crawl_service_run_unknown():
-    service = CrawlService()
+    service = _make_service()
     results = await service.run_spider("nonexistent")
     assert len(results) == 1
     assert results[0].success is False