Drives the real s3UploadService.uploadVideo for a generic (vhost-style) S3
connection with only the S3 I/O mocked, then feeds the published note's URLs
into r2Service.deleteVideoStorage. Asserts the upload writes video + .thumb +
.torrent, the note is valid (URL + magnet with info-hash), and cleanup deletes
exactly those objects using a forcePathStyle-aware S3 client — i.e. the upload
key and the cleanup-derived key agree (the parity property).
Co-Authored-By: Claude Opus 4.8 <[email protected]>
