Changes to Post Search

added the new llm_multiround enum value to the request property method

the response property data/episodes/items/session_id became optional for the status 200

response property data/episodes/items/session_id list-of-types was widened by adding types null to media type application/json of response 200

added the new optional request property min_score

removed the request property min_score

the response property data/episodes/items/session_id became required for the status 200

response property data/episodes/items/session_id list-of-types was narrowed by removing types null from media type application/json of response 200