Add conditional check for self-request in userRoute and fix customer_number type in orderBookingRoute

- Updated `getUserId` logic in `userRoute` to allow users to fetch their own user ID without requiring additional permissions.
- Corrected `customer_number` type in `orderBookingRoute` to always return an array.

services/nginx/app/routes/orderBookingRoute.php

@@ -110,7 +110,7 @@ class orderBookingRoute
                         'department' => $user->getGroup()->getDepartments()
                     ] : []),
                     ...(!$has_permission_other ? [
-                        'customer_number' => (int)$user->customer_number->value()
+                        'customer_number' => [(int)$user->customer_number->value()]
                     ] : [])
                 ])
             ));

services/nginx/app/routes/userRoute.php

@@ -148,9 +148,19 @@ class userRoute
         $this->get('/admin/customer/getUserId', function () {
             // Require the user to be logged in
             global $response;
-            $this->requirePermission('get_user_id');
             // Get the user object
             $user = (new authentication())->get_user();
+            // Check if it's the users own id request
+            if (!!$user && $this->isParametersSet(['customer_number']) && (int)$this->fromRequest('customer_number') === (int)$user->customer_number->value()) {
+                $response->success(
+                    [
+                        'user_id' => $user->id
+                    ]
+                );
+            }
+            // Otherwise, require permission.
+            $this->requirePermission('get_user_id');
+
             // Check if the request was successful
             if ($user) {
                 // Log the incident