feat: external plugin loading, score threshold, expiry cleanup and more improvements

Made-with: Cursor

app/plugins/__init__.py

@@ -37,3 +37,12 @@ registry.register(FpwPremproxyPlugin)
 registry.register(FpwFreeproxylistsPlugin)
 registry.register(FpwGatherproxyPlugin)
 registry.register(FpwCheckerproxyPlugin)
+
+# 可选：从 config 的 plugins_dir 加载用户插件（根目录下目录，非 app/plugins 包）
+from pathlib import Path
+
+from app.core.config import settings as _app_settings
+from app.core.config_paths import project_root as _project_root
+
+_ext_dir = _project_root() / _app_settings.plugins_dir
+registry.load_external_plugins_directory(_ext_dir)