- Salesforce: add validation/duplicate/access/storage error classes and
restore classification in error handler (400/409/403/503 vs generic 502)
- Freebit: add auth/rate-limit/validation/network error classes and
restore result-code-based classification (215, 381, 382)
- Portal: replace unsafe string→enum casts with typed state variables
- BaseRepository: narrow orderBy from unknown to Record<string, "asc"|"desc">
- WHMCS: narrow WhmcsNotFoundError.providerCode from string to union type
- Remove unused UnitOfWork service from PrismaModule
49d6d21974