29650ca512
Move to openspec/changes/archive/2026-07-09-per-instance-hook-scoping/ (R100 renames preserved). 9 artifacts. Canonical openspec/specs/ service-instance-scoping/ remains. Resolves multi-instance wrong-data bug (hooks now scope by instance.id; instance switcher re-scopes). Carry-overs: fetchBackupDashboard untouched (design decision 5); subquery scoping for runs/alerts (schema asymmetry).