You can't decide what to maintain without seeing what's bloating. Adds a
read-only health panel driven by Postgres' own statistics views.
- services/db_maintenance.py: get_table_health() queries pg_stat_user_tables +
pg_total_relation_size + pg_database_size — per-table size, live/dead tuples,
dead-tuple ratio (the bloat signal), and last (auto)vacuum/(auto)analyze.
- routes/admin.py: admin-only GET /api/admin/db-maintenance/health.
- SettingsView.vue: 'Table health' table in the maintenance card, all tables
sorted by dead tuples, rows >=20% dead-ratio flagged; total DB size shown;
refreshes after a Run-now so the dead-tuple drop is visible.
- Tests: health row/size shaping + null-timestamp passthrough; route + service
surface.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
bvandeusen
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