feat: add Messenger messages for import processing

src/Message/ImportFilmsBatchMessage.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Message;
+
+readonly class ImportFilmsBatchMessage
+{
+    public function __construct(
+        public int $importId,
+        public int $offset,
+        public int $limit,
+    ) {}
+}

src/Message/ProcessImportMessage.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Message;
+
+readonly class ProcessImportMessage
+{
+    public function __construct(
+        public int $importId,
+    ) {}
+}