File-store errors lose their status code #247

The static file functions (listFiles, updateFile, deleteFile, createDirectory, uploadFile) return the got promise without await inside a try. A rejected request skips the catch, so err.statusCode is never set.

As a result, a missing path comes back from the platform API as a 400 "HTTPError: Response code 404 (Not Found)" instead of a 404, because the forge routes only map errors that have statusCode === 404.

Fix: await the requests and read err.response?.statusCode.

Found while reviewing FlowFuse/flowfuse#8692.