bvandeusen
bd2807cdd1
Use `megatools dl` (Debian-native apt package) for mega.nz public links rather than MEGAcmd — no external MEGA apt repo/key to add, one apt line. Adds `megatools` to the runtime Dockerfile; the fetcher's mega backend now shells `megatools dl --path <dir> <url>` (key in the #fragment is preserved by the extractor). gdown (gdrive) is already a pip dep in the runtime image. NOTE: build.yml builds the image on main/tags only (not dev), so this Dockerfile change is verified on the next dev→main merge, not by this dev push. The fetcher code path is unit-tested via the mocked _run_mega_get seam. With this, all 5 hosts download end-to-end once a celery download-worker runs. Refs FC #830 (Phase 4c). Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>