Changes to Create a message

the response property id became nullable for the status 200

the response property model became nullable for the status 200

the response property role became nullable for the status 200

the response property id became optional for the status 200

the response property model became optional for the status 200

the response property role became optional for the status 200

the response property stop_reason became optional for the status 200

the response property stop_sequence became optional for the status 200

the role response property const value assistant was removed for the status 200

added subschema #1 subschema #2 subschema #3 subschema #4 subschema #5 subschema #6 subschema #7 subschema #8 subschema #9 subschema #10 subschema #11 subschema #12 subschema #13 subschema #14 subschema #15 subschema #16 subschema #17 to the content/items response property oneOf list for the response status 200

added the new assistant enum value to the role response property for the response status 200

added the new undefined enum value to the role response property for the response status 200

added the media type text/event-stream for the response with the status 200

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

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

added the optional property usage/cache_creation_input_tokens to the response with the 200 status

added the optional property usage/cache_read_input_tokens to the response with the 200 status

added the optional property usage/iterations to the response with the 200 status

added the optional property usage/total_tokens to the response with the 200 status