fix: 修复设置系统脱节、队列计数漂移、资源泄露等全量问题

- 统一设置系统：create_scheduler_service 读取 DB 设置覆盖默认值
- 修复 ProxyRepository.update_score 误删所有无效代理的 SQL
- ValidationQueue：修复 Worker 计数漂移与启动恢复任务饿死
- SchedulerService：移除 drain() 阻塞，主循环可正常响应 stop
- TaskService：在调度器周期内自动清理过期任务，防止内存泄漏
- lifespan/conftest：规范关闭顺序，消除 Event loop closed 警告
- Repository：异常日志增加 exc_info，今日新增按 created_at 统计
- ValidatorService：防止 HTTP session 重复关闭，移除 SOCKS 多余 close
- 前端：补全 pluginsStore.isEmpty，ProxyList 最低分数上限改为 100
- 删除 config.py 中冗余的 cors_origins_list property

app/api/routes/settings.py

@@ -4,7 +4,6 @@ from app.core.db import get_db
 from app.repositories.settings_repo import SettingsRepository
 from app.models.schemas import SettingsSchema
 from app.api.common import success_response, error_response
-from app.core.log import logger
 
 router = APIRouter(prefix="/api/settings", tags=["settings"])
 settings_repo = SettingsRepository()
@@ -12,23 +11,15 @@ settings_repo = SettingsRepository()
 
 @router.get("")
 async def get_settings():
-    try:
-        async with get_db() as db:
-            settings = await settings_repo.get_all(db)
-        return success_response("获取设置成功", settings)
-    except Exception as e:
-        logger.error(f"Get settings failed: {e}")
-        return error_response("获取设置失败", 500)
+    async with get_db() as db:
+        settings = await settings_repo.get_all(db)
+    return success_response("获取设置成功", settings)
 
 
 @router.post("")
 async def save_settings(request: SettingsSchema):
-    try:
-        async with get_db() as db:
-            success = await settings_repo.save(db, request.model_dump())
-        if not success:
-            return error_response("保存设置失败", 500)
-        return success_response("保存设置成功", request.model_dump())
-    except Exception as e:
-        logger.error(f"Save settings failed: {e}")
-        return error_response(f"保存设置失败: {str(e)}", 500)
+    async with get_db() as db:
+        success = await settings_repo.save(db, request.model_dump())
+    if not success:
+        return error_response("保存设置失败", 500)
+    return success_response("保存设置成功", request.model_dump())