refactor: подготовка к стандартизации Transfer моделей

Текущее состояние перед рефакторингом Transfer → TransferDocument.
Все изменения с последнего коммита по улучшению системы поступлений.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

myproject/inventory/migrations/0004_remove_incoming_batch_and_incoming.py

@@ -0,0 +1,23 @@
+# Generated by Django 5.0.10 on 2025-12-26 14:54
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('inventory', '0003_alter_documentcounter_counter_type_and_more'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='incomingbatch',
+            name='warehouse',
+        ),
+        migrations.DeleteModel(
+            name='Incoming',
+        ),
+        migrations.DeleteModel(
+            name='IncomingBatch',
+        ),
+    ]