feat(core): replace AutoSlugField with TweakedAutoSlugField for product slugs

Updated `product.slug` to use `TweakedAutoSlugField` for improved functionality, allowing unicode, overwrite capabilities, and enhanced population logic. Adjusted the corresponding migration script to ensure seamless database schema updates.

Also marked `brand.categories` as deprecated.

engine/core/migrations/0055_alter_brand_categories_alter_product_slug.py

@@ -0,0 +1,39 @@
+# Generated by Django 5.2.11 on 2026-02-21 19:12
+
+from django.db import migrations, models
+
+import engine.core.utils.db
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("core", "0054_product_export_to_marketplaces"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="brand",
+            name="categories",
+            field=models.ManyToManyField(
+                blank=True,
+                help_text="DEPRECATED",
+                to="core.category",
+                verbose_name="DEPRECATED",
+            ),
+        ),
+        migrations.AlterField(
+            model_name="product",
+            name="slug",
+            field=engine.core.utils.db.TweakedAutoSlugField(
+                allow_unicode=True,
+                blank=True,
+                editable=False,
+                max_length=88,
+                null=True,
+                overwrite=True,
+                populate_from=("name", "brand__slug", "category__slug", "uuid"),
+                unique=True,
+                verbose_name="Slug",
+            ),
+        ),
+    ]

engine/core/models.py

@@ -664,7 +664,7 @@ class Product(ExportModelOperationsMixin("product"), NiceModel):
         help_text=_("part number for this product"),
         verbose_name=_("part number"),
     )
-    slug = AutoSlugField(
+    slug = TweakedAutoSlugField(
         populate_from=(
             "name",
             "brand__slug",