Features: 1) Remove categories field from attribute model via migration;

Fixes: 1) Ensure database schema aligns with updated model definitions;

Extra: 1) Auto-generated migration script for database changes.

core/migrations/0050_remove_attribute_categories.py

@@ -0,0 +1,16 @@
+# Generated by Django 5.2.7 on 2025-10-26 14:10
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("core", "0049_alter_attribute_unique_together"),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name="attribute",
+            name="categories",
+        ),
+    ]