feat: fpw plugins, validation/crawl perf, WS stats, test DB isolation

- Add Free_Proxy_Website-style fpw_* plugins and register them
- Per-plugin crawl timeout (crawl_timeout_seconds=120); remove global crawl_timeout setting
- Validator: fix connect vs total timeout on save; SOCKS session LRU cache; drop redundant semaphore
- Validation handler uses single DB connection; batch upsert after crawl; WorkerPool put_nowait
- Remove unused max_retries from settings API/UI; settings maintenance SQL + init_db cleanup of deprecated keys
- WebSocket dashboard stats; ProxyList pool_filter and API alignment
- POST /api/proxies/delete-one for IPv6-safe deletes; task poll stops on 404
- pytest uses PROXYPOOL_DB_PATH=db/proxies.test.sqlite so tests do not wipe production DB
- .gitignore: explicit proxies.test.sqlite patterns; fix plugin_service ValidationException import

Made-with: Cursor

tests/unit/test_models.py

@@ -106,6 +106,14 @@ class TestProxyListRequest:
         assert request.page_size == 50
         assert request.protocol == "https"
 
+    def test_pool_filter_pending_available(self):
+        r1 = ProxyListRequest(pool_filter="pending")
+        assert r1.pool_filter == "pending"
+        r2 = ProxyListRequest(pool_filter="all")
+        assert r2.pool_filter is None
+        with pytest.raises(Exception):
+            ProxyListRequest(pool_filter="invalid")
+
 
 class TestSettingsSchema:
     """测试 SettingsSchema"""
@@ -113,16 +121,22 @@ class TestSettingsSchema:
     def test_default_settings(self):
         """测试默认设置"""
         settings = SettingsSchema()
-        assert settings.crawl_timeout == 30
-        assert settings.validation_timeout == 10
+        assert settings.validation_timeout == 6
+        assert settings.default_concurrency == 120
         assert settings.auto_validate is True
+        assert settings.auto_validate_after_crawl is False
 
     def test_custom_settings(self):
         """测试自定义设置"""
-        settings = SettingsSchema(crawl_timeout=60, auto_validate=False)
-        assert settings.crawl_timeout == 60
+        settings = SettingsSchema(validation_timeout=25, auto_validate=False)
+        assert settings.validation_timeout == 25
         assert settings.auto_validate is False
 
+    def test_settings_schema_ignores_unknown_fields(self):
+        s = SettingsSchema.model_validate({"validation_timeout": 10, "crawl_timeout": 99})
+        assert "crawl_timeout" not in s.model_dump()
+        assert s.validation_timeout == 10
+
 
 class TestBatchDeleteRequest:
     """测试 BatchDeleteRequest"""