test(qa): verify native Kingbase restore migration and fusion workflows

scripts/qa/QaDruidProbe.java

@@ -0,0 +1,16 @@
+import com.alibaba.druid.pool.DruidDataSource;
+import java.sql.*;
+/** Read-only actual Kingbase/Druid initialization probe, secrets only from environment. */
+class QaDruidProbe {
+ public static void main(String[] args)throws Exception {
+  String url=System.getenv("QA_DB_URL");
+  if(url==null || !url.matches("jdbc:kingbase8://192\\.168\\.139\\.218:4321/railwaysystem_fusion_qa_20261013(?:\\?.*)?"))throw new SecurityException();
+  try(DruidDataSource ds=new DruidDataSource()) {
+   ds.setDriverClassName("com.kingbase8.Driver");ds.setUrl(url);ds.setUsername("fusion_qa_app");ds.setPassword(System.getenv("QA_DB_PASSWORD"));
+   ds.setInitialSize(1);ds.setMaxActive(2);ds.setMinIdle(1);ds.setConnectTimeout(30000);ds.setSocketTimeout(60000);
+   if(args.length>0)ds.setConnectionProperties(args[0]);
+   ds.setValidationQuery("select 1");ds.setConnectionInitSqls(java.util.List.of("set search_path to iotlocks,public,pg_catalog,sys_catalog"));
+   ds.init();try(Connection c=ds.getConnection()){c.setReadOnly(true);c.setAutoCommit(false);try(Statement s=c.createStatement();ResultSet r=s.executeQuery("select current_database(),current_user")){r.next();System.out.println(r.getString(1)+" | "+r.getString(2)+" | network_timeout_ms="+c.getNetworkTimeout());}c.rollback();}
+  }
+ }
+}