- INSERT INTO users (id=1, is_admin=true) ON DUPLICATE KEY UPDATE is_admin=true (idempotent) - Supplies placeholder non-null oidc_iss='dev-bypass', oidc_sub='dev-user-1', color='#4A90D9' - requireAdmin (Plan 02) does a DB lookup for the bypass user; without this seed it would 403 - Existing calendar/event/list seeds unchanged (INSERT IGNORE INTO calendars, Seeded Test Event)