Add conversation_history object to query api

[thomasjlittle]

Description

Adding the conversation_history object to the query api. This param is already supported by search_engine.astream_search and search_engine.asearch

Related Issues

None

Proposed Changes

Added conversation_history as a parameter to the query apis (local_search, drift_search, etc.)

Checklist

• [x] I have tested these changes locally.
• [x] I have reviewed the code changes.

Additional Notes

None