fina autoamtiona adn billing and credits

backend/igny8_core/modules/billing/migrations/0003_creditcostconfig.py

@@ -0,0 +1,39 @@
+# Generated by Django 5.2.8 on 2025-12-04 14:38
+
+import django.core.validators
+import django.db.models.deletion
+from django.conf import settings
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('billing', '0002_initial'),
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='CreditCostConfig',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('operation_type', models.CharField(choices=[('clustering', 'Keyword Clustering'), ('idea_generation', 'Content Ideas Generation'), ('content_generation', 'Content Generation'), ('image_generation', 'Image Generation'), ('reparse', 'Content Reparse'), ('ideas', 'Content Ideas Generation'), ('content', 'Content Generation'), ('images', 'Image Generation')], help_text='AI operation type', max_length=50, unique=True)),
+                ('credits_cost', models.IntegerField(help_text='Credits required for this operation', validators=[django.core.validators.MinValueValidator(0)])),
+                ('unit', models.CharField(choices=[('per_request', 'Per Request'), ('per_100_words', 'Per 100 Words'), ('per_200_words', 'Per 200 Words'), ('per_item', 'Per Item'), ('per_image', 'Per Image')], default='per_request', help_text='What the cost applies to', max_length=50)),
+                ('display_name', models.CharField(help_text='Human-readable name', max_length=100)),
+                ('description', models.TextField(blank=True, help_text='What this operation does')),
+                ('is_active', models.BooleanField(default=True, help_text='Enable/disable this operation')),
+                ('created_at', models.DateTimeField(auto_now_add=True)),
+                ('updated_at', models.DateTimeField(auto_now=True)),
+                ('previous_cost', models.IntegerField(blank=True, help_text='Cost before last update (for audit trail)', null=True)),
+                ('updated_by', models.ForeignKey(blank=True, help_text='Admin who last updated', null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='credit_cost_updates', to=settings.AUTH_USER_MODEL)),
+            ],
+            options={
+                'verbose_name': 'Credit Cost Configuration',
+                'verbose_name_plural': 'Credit Cost Configurations',
+                'db_table': 'igny8_credit_cost_config',
+                'ordering': ['operation_type'],
+            },
+        ),
+    ]