Homebrew's rclone is compiled without 'mount' support on macOS. Resolve a
mount-capable binary ($HOME/bin/rclone, official rclone.org build) and fail
fast with install guidance if none is found. brew rclone still serves plain
transfers via spaces-env.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Generalize the photos-originals rclone-mount pattern to a video-projects
prefix so the video studio (and imajin ETL, per storage-portability-plan
§2.3) can read/write multi-GB project sources/renders as local files while
only hot data stays resident on plum (bounded VFS LRU cache). Lets a
small-disk laptop work with large footage without filling APFS.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
