global-setup.ts seeds calendars/lists/events for user_id=1 but never creates the user (DEV_AUTH_BYPASS injects DEV_USER in-memory only). On a fresh CI DB the calendars INSERT IGNORE is silently skipped on the users FK → calendar 10 missing → calendar_events insert fails FK. Add an idempotent users(id=1) seed after migrate (validated locally: full insert chain passes). No harness files changed.