✨ feat(driver): 新增 OceanBase 与 OpenGauss Agent 数据源

- 数据源支持：新增 OceanBase 与 OpenGauss optional driver-agent 实现
- 连接适配：复用 MySQL/PostgreSQL 兼容链路并补齐查询、DDL、同步能力
- 前端入口：补充连接表单、侧边栏、图标、SQL 方言和危险操作识别
- 驱动管理：更新 driver manifest、安装提示和 revision 自动生成链路
- 构建发布：支持多平台 driver-agent 打包并优化 release 构建失败提示

docs/driver-manifest.json

@@ -7,6 +7,12 @@
       "checksumPolicy": "off",
       "downloadUrl": "builtin://activate/mariadb"
     },
+    "oceanbase": {
+      "engine": "go",
+      "version": "1.9.3",
+      "checksumPolicy": "off",
+      "downloadUrl": "builtin://activate/oceanbase"
+    },
     "doris": {
       "engine": "go",
       "version": "1.9.3",
@@ -61,6 +67,12 @@
       "checksumPolicy": "off",
       "downloadUrl": "builtin://activate/vastbase"
     },
+    "opengauss": {
+      "engine": "go",
+      "version": "1.11.1",
+      "checksumPolicy": "off",
+      "downloadUrl": "builtin://activate/opengauss"
+    },
     "mongodb": {
       "engine": "go",
       "version": "2.5.0",