feat: Support Password Access for ElasticSearch (#1072)

### What problem does this PR solve?

Using password authentication to access ElasticSearch is essential,
especially in a production environment.

This PR will enable password access support.

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

conf/service_conf.yaml

@@ -15,6 +15,8 @@ minio:
   host: 'minio:9000'
 es:
   hosts: 'http://es01:9200'
+  username: 'elastic'
+  password: 'infini_rag_flow'
 redis:
   db: 1
   password: 'infini_rag_flow'