feat(10-01): add v1.1 schema bundle (is_admin, provider_type, reminder_lead_minutes, app_config)
- users.isAdmin: boolean NOT NULL DEFAULT false (first-login-wins admin flag, D-01)
- memberCredentials.providerType: varchar(64) NOT NULL DEFAULT 'caldav' (generic provider discriminator, D-04)
- memberCredentials: UNIQUE(user_id) constraint for one-credential-per-member + upsert support (D-05)
- calendarEvents.reminderLeadMinutes: int nullable (created now, consumed by Phase 11)
- appConfig table: key VARCHAR PK, value TEXT, updated_at (setup_complete consumed by Phase 12)
Lucas Berger
d0a4cb4e35