The nightly database backup (and "Run DB backup now") now sends pg_dump's
output straight to the off-site bucket as a multipart upload, with no copy
staged on this server. The object is named database/fabledcurator-<UTC
time>.dump and appears only once pg_dump has exited cleanly and every part
has landed; a failed dump aborts the upload and records pg_dump's last line.
Without a destination, dumps are written to /images/_backups as before.
- backup_s3: Upload (start / add part / complete / abort), with a busy or
silent bucket rested and asked again (15 s, 60 s, Retry-After obeyed), and
a Pacer that holds uploads to the new bandwidth limit.
- Settings: "Upload limit (Mbit/s)" on the destination card, 200 by default,
0 for none (migration 0120).
- pg_dump runs under nice (and ionice where installed), locally too.
- Backups card says where dumps go; the runs table gains "Saved to" and
shows a failed run's error. Off-site rows have no restore/tag/delete here:
restoring from the bucket is a later step (#6880).
Task #6878, milestone 586.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
