- DiagnosticsController: replaced raw [Authorize(Roles = "SuperAdmin,Administrator")] with [Authorize(Policy = SuperAdminOnly)] to match every other platform-admin controller; added PowderCoating.Shared.Constants using directive
- DataPurge, DataExport, StorageMigration, SeedData: added "← Maintenance" breadcrumb link at the top of each page so operators know they are in the guarded maintenance area and can navigate back to the hub
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
spouliot