⚡️ perf(database): 优化查询元数据加载和连接释放

- 查询编辑器仅预取当前库及 SQL 显式引用库的元数据
- 断开侧边栏连接时主动释放同实例后端缓存连接
- 完善 Redis 连接释放和 Wails 前端绑定
- 修复 SQL Server 存储过程消息结果显示
- 调整查询工具栏布局并补充回归测试
Close #541

frontend/wailsjs/go/app/App.d.ts

@@ -62,6 +62,8 @@ export function DBQueryMultiTransactional(arg1:connection.ConnectionConfig,arg2:
 
 export function DBQueryWithCancel(arg1:connection.ConnectionConfig,arg2:string,arg3:string,arg4:string):Promise<connection.QueryResult>;
 
+export function DBReleaseConnection(arg1:connection.ConnectionConfig):Promise<connection.QueryResult>;
+
 export function DBRollbackTransaction(arg1:string):Promise<connection.QueryResult>;
 
 export function DBShowCreateTable(arg1:connection.ConnectionConfig,arg2:string,arg3:string):Promise<connection.QueryResult>;

frontend/wailsjs/go/app/App.js

@@ -114,6 +114,10 @@ export function DBQueryWithCancel(arg1, arg2, arg3, arg4) {
   return window['go']['app']['App']['DBQueryWithCancel'](arg1, arg2, arg3, arg4);
 }
 
+export function DBReleaseConnection(arg1) {
+  return window['go']['app']['App']['DBReleaseConnection'](arg1);
+}
+
 export function DBRollbackTransaction(arg1) {
   return window['go']['app']['App']['DBRollbackTransaction'](arg1);
 }