Finish Schoolhouse programming submission flow

home/doris-schoolhouse/DEPLOYMENT.md

@@ -66,3 +66,26 @@ Then verify:
 - assignment intake confirms into n8n/Paperless
 - recording conversion works inside container
 - recording downstream workflow returns success
+- browser uploads return to `/assignments/upload` with a success notice instead of rendering raw JSON
+- programming-class uploads create one `source_bundle` submission and immediately queue the Paperless receipt upload
+
+## Serenity backup on NOMAD
+
+If Schoolhouse submission bundles should survive a NOMAD disk problem, back up `/opt/doris-schoolhouse/data` to Serenity.
+
+Current live helper:
+
+```bash
+/opt/doris-schoolhouse/bin/backup-to-serenity.sh
+```
+
+Behavior:
+- mounts Serenity NFS export `10.5.1.5:/mnt/user/data` at `/mnt/serenity-data` when needed
+- mirrors `/opt/doris-schoolhouse/data/` into `/mnt/serenity-data/backups/nomad/doris-schoolhouse/data/`
+- writes `last_success_utc.txt` and `source_host.txt` markers beside the mirrored data
+
+Suggested cron on NOMAD:
+
+```cron
+40 2 * * * /opt/doris-schoolhouse/bin/backup-to-serenity.sh >> /opt/doris-schoolhouse/logs/backup-to-serenity.log 2>&1
+```