Completes the §8 API consolidation: one admin surface drives a BackupPolicy for
ANY target — application, wordpress_site, database, files, server — by
(target_type, target_id):
GET/PUT /api/v1/backups/policies/<type>/<id> (PUT accepts
target_subtype + target_meta to describe database/files targets)
POST /api/v1/backups/policies/<type>/<id>/run
GET /api/v1/backups/policies/<type>/<id>/runs
POST .../runs/<run_id>/restore | /verify
DELETE .../runs/<run_id>
This is the only way to drive the database/files/server targets (which have no
per-resource page). The grant-aware per-resource mounts
(/apps/:id/backup-policy, /wordpress/sites/:id/backup-policy) are unchanged.
Deferred to §7 (WordPress-as-app): surfacing WP DatabaseSnapshot under
/apps/:id/db-snapshots, and the frontend Backups.jsx rewrite, both of which
depend on the app↔site unification.
Verified: 5 new tests; full backup/snapshot suite green (63 passed, 2 skipped).
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
