Changes to Run a deep-research agent (multi-step research, async)

added the non-success response with the status 502

added the new optional request property effort

added the new optional request property locale

added the new optional request property output_settings

added the new optional request property thread_id

added the new optional request property timezone

request property source_indexes list-of-types was widened by adding types null to media type application/json

removed the success response with the status 200

added the media type application/json for the response with the status 202

added the media type application/problem+json for the response with the status 402

added the non-success response with the status 400

added the non-success response with the status 404

added the non-success response with the status 409

added the non-success response with the status 429

added the non-success response with the status 500