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
