| """Domain and persistence errors for the review app.""" | |
| class DatabaseError(Exception): | |
| """Base class for data-layer failures.""" | |
| class DuplicateRecordError(DatabaseError): | |
| """Postgres UNIQUE constraint violation.""" | |
| class DuplicateFeedbackError(DuplicateRecordError): | |
| """Feedback already submitted for this session and task.""" | |
| class DuplicateSessionError(DuplicateRecordError): | |
| """Session already exists for this invite (concurrent create).""" | |