Update Elastic Search, QDrant, and PGVector to `retrieve_online_documents_v2` method

Is your feature request related to a problem? Please describe.
Update Elastic Search, QDrant, and PGVector to retrieve_online_documents_v2 method, as it returns broader features.

Describe the solution you'd like
V2 is the better method.

Describe alternatives you've considered
N/A

Additional context
N/A