Changes to Read Tracer Session

the detail/items response's property type changed from object to string for status 422

removed the required property detail/items/loc from the response with the 422 status

removed the required property detail/items/msg from the response with the 422 status

removed the required property detail/items/type from the response with the 422 status

the completion_cost/anyOf[subschema #1] response's property pattern ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$ was added for the status 200

the prompt_cost/anyOf[subschema #1] response's property pattern ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$ was added for the status 200

the total_cost/anyOf[subschema #1] response's property pattern ^(?!^[-+.]*$)[+-]?0*\d*\.?\d*$ was added for the status 200

added the optional property experiment_progress to the response with the 200 status