Add database migrations for CalendarSubscriptionToken model and create index on token+is_active for efficient lookups. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
Add database migrations for CalendarSubscriptionToken model and create index on token+is_active for efficient lookups. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>