refactor: replace custom CRM with Monica fork

app/Models/Instance/Instance.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Models\Instance;
+
+use Illuminate\Support\Facades\DB;
+use Illuminate\Database\Eloquent\Model;
+
+class Instance extends Model
+{
+    /**
+     * Once migrations have been run to add a new default contact field type,
+     * we need to mark the field as being migrated so we don't create another
+     * default contact field type if another migration will change this table
+     * in the future.
+     */
+    public function markDefaultContactFieldTypeAsMigrated()
+    {
+        DB::table('default_contact_field_types')
+            ->update(['migrated' => 1]);
+    }
+}