Round 3 fixes: cancelled polling, aggregator invalid_count, filter state, scheduler atomicity, HTTP exception handler, tests

tests/integration/test_settings_api.py

@@ -135,3 +135,32 @@ class TestSettingsAPI:
         # 验证一致性
         for key, value in test_settings.items():
             assert saved_settings[key] == value, f"设置项 {key} 不一致"
+
+    @pytest.mark.asyncio
+    async def test_settings_roundtrip_with_validation_targets(self, client):
+        """测试设置读写一致性 - 包含数组类型的 validation_targets"""
+        test_settings = {
+            "crawl_timeout": 30,
+            "validation_timeout": 10,
+            "max_retries": 3,
+            "default_concurrency": 50,
+            "min_proxy_score": 0,
+            "proxy_expiry_days": 7,
+            "auto_validate": True,
+            "validate_interval_minutes": 30,
+            "validation_targets": [
+                "http://example.com/1",
+                "https://example.com/2",
+            ],
+        }
+
+        # 写入设置
+        response = await client.post("/api/settings", json=test_settings)
+        assert response.status_code == 200
+        data = response.json()
+        assert data["data"]["validation_targets"] == test_settings["validation_targets"]
+
+        # 读取设置
+        response = await client.get("/api/settings")
+        saved_settings = response.json()["data"]
+        assert saved_settings["validation_targets"] == test_settings["validation_targets"]