Julien Gautier
b625090c63
ON DELETE RESTRICT was Prisma's default for required relations; Structure.delegation is optional (`Delegation?`), so the matching default is ON DELETE SET NULL. Mismatch caused `prisma migrate dev` to detect drift and prompt for a corrective migration on every run. Caught locally on first VM-side validation. No production deployment of #228 yet, so editing the migration in place rather than shipping a corrective sibling - keeps the repo's migration history minimal. Inline comment at the offending line explains the rule (nullable Prisma relation -> SET NULL) to head off the same mistake when ADR-0026 PR 1 adds optional FKs (Person.user, User.scopes).