- Create router_config_snapshots table with Transit ciphertext storage
- Create router_config_diffs table with snapshot pair FK references
- Create router_config_changes table for parsed semantic changes
- Add RLS tenant isolation (ENABLE + FORCE + USING + WITH CHECK) on all 3
- Add GRANT SELECT/INSERT/DELETE to app_user on all 3
- Add performance indexes: device+collected_at, device+hash, snapshot pair, diff_id
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
