feat: change email, export my data, delete account (with data anonymization)

internal/domain/audit/auditRepositoryInterface.go

@@ -9,6 +9,7 @@ type Repository interface {
 	DeleteOlderThan(cutoff time.Time) (int, error)
 	DeleteOldest(limit int, before time.Time) (int, error)
 	SizeBytes() (int64, error)
+	AnonymiseUser(userID uint32, ownAuthorID *uint32, name string) error
 }
 
 type SettingsRepository interface {