Changes to Create a chat completion

removed the enum value priority of the request property metadata/completion_window

added the new content_filter enum value to the choices/items/finish_reason response property for the response status 200 (media type: text/event-stream)

added the new length enum value to the choices/items/finish_reason response property for the response status 200 (media type: text/event-stream)

added the new optional header request parameter X-Sail-Completion-Window

added the new optional request property metadata/supercache_write

added the new optional request property prompt_cache_key

added the new balanced enum value to the request property metadata/completion_window

added the new max enum value to the request property reasoning_effort/oneOf[subschema #1]

added ChatFileContentPart to the messages/items/content/oneOf[subschema #3]/items request property oneOf list

added the non-success response with the status 409

added the non-success response with the status 503

added the non-success response with the status 504

removed the non-success response with the status 408

added the optional property service_tier to the response with the 200 status (media type: application/json)

added the optional property service_tier to the response with the 200 status (media type: text/event-stream)