* Add model downloading endpoint.
* Move client session init to async function.
* Break up large function.
* Send "download_progress" as websocket event.
* Fixed
* Fixed.
* Use async mock.
* Move server set up to right before run call.
* Validate that model subdirectory cannot contain relative paths.
* Add download_model test checking for invalid paths.
* Remove DS_Store.
* Consolidate DownloadStatus and DownloadModelResult
* Add progress_interval as an optional parameter.
* Use tuple type from annotations.
* Use pydantic.
* Update comment.
* Revert "Use pydantic."
This reverts commit 7461e8eb00.
* Add new line.
* Add newline EOF.
* Validate model filename as well.
* Add comment to not reply on internal.
* Restrict downloading to safetensor files only.
Robin Huang