perf: 优化启动时，数据集初始化

backend/src/main/java/io/dataease/service/datasource/DatasourceService.java

@@ -323,12 +323,15 @@ public class DatasourceService {
     public void initAllDataSourceConnectionPool() {
         List<Datasource> datasources = datasourceMapper.selectByExampleWithBLOBs(new DatasourceExample());
         datasources.forEach(datasource -> {
+            commonThreadPool.addTask(()->{
+                System.out.println(System.currentTimeMillis());
                 try {
                     handleConnectionPool(datasource, "add");
                 } catch (Exception e) {
-                e.printStackTrace();
+                    LogUtil.error("Failed to init datasource: " + datasource.getName(), e);
                 }
             });
+        });
     }
 
     private void checkName(Datasource datasource) {