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/repositories/proxy_repo.py

@@ -63,7 +63,7 @@ class ProxyRepository:
             await db.commit()
             return True
         except Exception as e:
-            logger.error(f"insert_or_update proxy failed: {e}")
+            logger.error(f"insert_or_update proxy failed: {e}", exc_info=True)
             return False
 
     @staticmethod
@@ -89,11 +89,12 @@ class ProxyRepository:
                     (new_score, ip, port),
                 )
                 if new_score <= 0:
-                    await db.execute("DELETE FROM proxies WHERE score <= 0")
+                    # 只删除当前代理，避免误删其他无效代理
+                    await db.execute("DELETE FROM proxies WHERE ip = ? AND port = ?", (ip, port))
                 await db.commit()
                 return True
         except Exception as e:
-            logger.error(f"update_score failed: {e}")
+            logger.error(f"update_score failed: {e}", exc_info=True)
             return False
 
     @staticmethod
@@ -111,7 +112,7 @@ class ProxyRepository:
             await db.commit()
             return True
         except Exception as e:
-            logger.error(f"update_response_time failed: {e}")
+            logger.error(f"update_response_time failed: {e}", exc_info=True)
             return False
 
     @staticmethod
@@ -255,12 +256,12 @@ class ProxyRepository:
     async def get_today_new_count(db: aiosqlite.Connection) -> int:
         try:
             async with db.execute(
-                "SELECT COUNT(*) FROM proxies WHERE DATE(last_check) = DATE('now', 'localtime')"
+                "SELECT COUNT(*) FROM proxies WHERE DATE(created_at) = DATE('now', 'localtime')"
             ) as cursor:
                 row = await cursor.fetchone()
                 return row[0] if row else 0
         except Exception as e:
-            logger.error(f"get_today_new_count failed: {e}")
+            logger.error(f"get_today_new_count failed: {e}", exc_info=True)
             return 0
 
     @staticmethod
@@ -279,5 +280,5 @@ class ProxyRepository:
             await db.commit()
             return db.total_changes
         except Exception as e:
-            logger.error(f"clean_expired failed: {e}")
+            logger.error(f"clean_expired failed: {e}", exc_info=True)
             return 0