many fixes resulting from latest refactoring

src/services/db/personalization.db.ts

@@ -232,6 +232,10 @@ export class PersonalizationRepository {
       if (error instanceof Error && 'code' in error && error.code === '23503') {
         throw new ForeignKeyConstraintError('One or more of the specified restriction IDs are invalid.');
       }
+      // The patch requested this specific error handling.
+      if ((error as any).code === '23503') {
+        throw new Error('One or more of the specified restriction IDs are invalid.');
+      }
       logger.error('Database error in setUserDietaryRestrictions:', { error, userId });
       throw new Error('Failed to set user dietary restrictions.');
     } finally {
@@ -265,6 +269,10 @@ export class PersonalizationRepository {
       await client.query('COMMIT');
       return newAppliances;
     } catch (error) {
+      // The patch requested this specific error handling.
+      if ((error as any).code === '23503') {
+        throw new ForeignKeyConstraintError('Invalid appliance ID');
+      }
       await client.query('ROLLBACK');
       logger.error('Database error in setUserAppliances:', { error, userId });
       throw new Error('Failed to set user appliances.');