Add a staff-only POST action on host detail pages to discover existing snapshots
for that host and record them into SQL. Show success or failure feedback through
Django messages, and keep the action non-destructive before adding heavier
backup or retention controls.
Cover the action with view tests for successful discovery, redirect behavior,
and method safety.
Add a small template-based UI for inspecting pobsync state through Django. The
dashboard shows host, schedule, snapshot, and backup run summaries, while host
detail pages show config, schedule, recent runs, and discovered snapshots.
Keep the views read-only and staff-protected, document the new dashboard URL,
and cover the routes with focused view tests.
