feat: initialize Dr-Panel project with patient file number support

app/Observers/VisitObserver.php

@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Observers;
+
+use App\Models\Visit;
+
+class VisitObserver
+{
+    public function created(Visit $visit): void
+    {
+        $this->touchPatient($visit);
+    }
+
+    public function updated(Visit $visit): void
+    {
+        $this->touchPatient($visit);
+    }
+
+    private function touchPatient(Visit $visit): void
+    {
+        $patient = $visit->patientRecord;
+        if (! $patient) {
+            return;
+        }
+        $patient->updated_at = now();
+        $patient->save();
+    }
+}