Changes to List models for a project

added the new required query request parameter project_id

the response property items/items/user_id became optional for the status 200

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

added the optional property items/items/project_id to the response with the 200 status

added the optional property items/items/source_model_id to the response with the 200 status