Consolidate and update initial migrations and models

Regenerated initial migrations for account, advertisement, commerce, configuration, and social apps to include recent schema changes and remove obsolete migration files. Added new migrations for Deutsche Post and Zasilkovna integrations, including new fields and choices. Updated commerce models to improve currency handling and discount code logic. This unifies the database schema and prepares for new features and integrations.

backend/thirdparty/zasilkovna/migrations/0002_alter_zasilkovnapacket_state.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.7 on 2026-01-24 22:44
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('zasilkovna', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='zasilkovnapacket',
+            name='state',
+            field=models.CharField(choices=[('WAITING_FOR_ORDERING_SHIPMENT', 'Čeká na objednání zásilkovny'), ('PENDING', 'Podáno'), ('SENDED', 'Odesláno'), ('ARRIVED', 'Doručeno'), ('CANCELED', 'Zrušeno'), ('RETURNING', 'Posláno zpátky'), ('RETURNED', 'Vráceno')], default='PENDING', max_length=35),
+        ),
+    ]