Extract Ladill QR Plus as standalone app at qr.ladill.com.

Utility QR types only (URL, WiFi, link list, business, app download) with
SSO, Billing API integration, public /q resolver, and qr-plus:import for
platform migration. vCard and commerce types stay on the platform.

Co-authored-by: Cursor <cursoragent@cursor.com>

app/Models/QrScanEvent.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class QrScanEvent extends Model
+{
+    protected $fillable = [
+        'qr_code_id',
+        'scanned_at',
+        'ip_hash',
+        'user_agent',
+        'device_type',
+        'browser',
+        'os',
+        'country_code',
+        'referrer',
+        'is_unique',
+    ];
+
+    protected $casts = [
+        'scanned_at' => 'datetime',
+        'is_unique' => 'boolean',
+    ];
+
+    public function qrCode(): BelongsTo
+    {
+        return $this->belongsTo(QrCode::class);
+    }
+}