🐛 fix(connection): 修复多数据源连接打开异常

- 修复 Milvus 等数据源类型被错误回退为 MySQL
- 为 ClickHouse 22.8 增加旧版 JSON HTTP 兼容回退
- 使用轻量别名接口验证 Elasticsearch 索引枚举
- 更新可选驱动 revision 并补充回归测试

tools/generate-driver-agent-revisions.sh

@@ -138,6 +138,7 @@ mongodb:internal/db/mongodb_impl_v1.go|\
 tdengine:internal/db/tdengine_impl.go|\
 iotdb:internal/db/iotdb_impl.go|\
 clickhouse:internal/db/clickhouse_impl.go|\
+clickhouse:internal/db/clickhouse_legacy_http.go|\
 elasticsearch:internal/db/elasticsearch_impl.go|\
 elasticsearch:internal/db/elasticsearch_helpers.go|\
 trino:internal/db/trino_impl.go)