Fix PostgreSQL GROUP BY rule for images/patients route

dental-server/routes/images.js

@@ -64,9 +64,9 @@ router.get('/patients', async (req, res) => {
     const rows = await db.all(
       `SELECT
          patient_name,
-         doctor,
+         MAX(doctor) AS doctor,
-         remark,
+         MAX(remark) AS remark,
-         client_name,
+         MAX(client_name) AS client_name,
          COUNT(*) AS image_count,
          MAX(created_at) AS last_date,
          (SELECT filename FROM images i2