Served from the per-client stack behind the box Traefik (project clientb · XFS bhard=5g · DB shape ii: the datadir shares the cap) — instantiated from the repo TEMPLATE runtime/deploy/vps/clients/compose.client.yml (its first real use; client A ran the literal instance).
Reported ceiling: 5,120 MiB (the project cap, not the 55 GB partition) · Used 208.5 MiB · Free 4,911.5 MiB (4%)
At the cap this write fails with ENOSPC — the error banner is the client-facing UX.