Implement Lane Status Audit and Comprehensive Self-Serve API Enhancements

- Introduced `machine_status_audit` in self-serve lanes for tracking changes.
- Added new methods to handle audit data including `setLaneStatusAudit` and `getMachineStatusAudit`.
- Enhanced API tests to include legacy Redis constant checks and validated comprehensive self-serve invoice creation.
- Updated department lanes to reflect audit logs in their responses.

services/nginx/app/routes/moduleSelfServeRoute.php

@@ -83,6 +83,13 @@ class moduleSelfServeRoute
             $lane->setLaneStatus($target_status);
 
             $user = (new authentication())->get_user();
+            $machine_status_audit = [
+                'modified_at' => date(DATE_ATOM),
+                'modified_by_user_id' => $user ? (int)$user->id : null,
+                'modified_by_name' => $this->machineStatusAuditUserName($user),
+            ];
+            $lane->setLaneStatusAudit($machine_status_audit);
+
             (new logs_o())->add(
                 'selfserve',
                 'global',
@@ -97,6 +104,10 @@ class moduleSelfServeRoute
                 'id' => $lane->id,
                 'status' => $status,
                 'machine_status_enabled' => department_lanes_o::isOperationalStatusName($status),
+                'machine_status_audit' => $machine_status_audit,
+                'machine_status_modified_at' => $machine_status_audit['modified_at'],
+                'machine_status_modified_by' => $machine_status_audit['modified_by_name'],
+                'machine_status_modified_by_user_id' => $machine_status_audit['modified_by_user_id'],
                 'lane' => $department_lane->asArray(),
             ]);
         },
@@ -1601,6 +1612,33 @@ class moduleSelfServeRoute
         return $toggle_after;
     }
 
+    private function machineStatusAuditUserName(?object $user): ?string
+    {
+        if (!$user) {
+            return null;
+        }
+
+        foreach (['display_name', 'email'] as $property) {
+            if (!isset($user->{$property}) || !is_object($user->{$property}) || !method_exists($user->{$property}, 'value')) {
+                continue;
+            }
+
+            $value = trim((string)$user->{$property}->value());
+            if ($value !== '' && strtolower($value) !== 'unnamed') {
+                return $value;
+            }
+        }
+
+        if (isset($user->customer_number) && is_object($user->customer_number) && method_exists($user->customer_number, 'value')) {
+            $customer_number = (int)$user->customer_number->value();
+            if ($customer_number > 0) {
+                return 'Kunde ' . $customer_number;
+            }
+        }
+
+        return isset($user->id) ? 'Bruger #' . (int)$user->id : null;
+    }
+
     private function requestedBoolean(string $parameter, bool $default = false): bool
     {
         if (!self::isParametersSet([$parameter])) {