- The queue keeps a done job by when it became done (ready_at), not by its last write: renaming,
keeping or moving an old file, or the GC's expiry warning, no longer brings it back as just finished.
- GC expiry and eviction re-read each file under the asset→job locks the user routes take, and commit
one file at a time: a delete, a re-download or a keep made while the GC runs is honoured, never a
second release that frees a file another user still holds.
- A file records the origin it was placed under (download_jobs.source_key, migration 0105): an edit
whose parent expired still goes back to its folder, not to Uploads.
- A folder a file is being put in is held (FOR SHARE) until it lands; a delete of it waits and takes
that file home too, instead of failing on the foreign key.
- The hash route reads at most two files at once (429 past that) and holds no connection meanwhile.
- 0104's backfill dates old files by their request date only: no notice prod wrote names its job.
- The old DOWNLOAD_ROOT still finds the files; a files root that is not a mounted volume stops the
worker and is logged by the API; the volume-copy recipe looks the project-prefixed names up.
- Stale comments about the /downloads mount and the Downloads page.
The admin page's download_worker_concurrency and log_level were stored but never reached the worker:
it read the env once at boot (worker.py) and never looked again. The worker now re-reads both every
10 s (_sync_knobs): extra loop threads start at once, surplus ones retire after their current job, and
a changed level is applied to the process. An unreadable database keeps what already runs.
peter