Audit fixes 2026-10-03: seed keeps admin edits, plan cache, refresh limit, payment and tutor guards

- seed_content no longer undoes admin work: a SeedRecord ledger (content/seed_sync.py)
  stops deleted/renamed/re-worded content from being recreated and keeps admin-edited
  lesson text; new rows in the seed files still arrive (migration content.0010)
- plan list cache is invalidated on Plan save (receiver used a stale 'v1' key)
- token refresh per-IP cap 30/hour -> 600/hour (TOKEN_REFRESH_IP_RATE)
- a failed gateway result only changes a pending order (forged NOK no longer
  overwrites refunded/canceled)
- tutor gets the correct answer only after the student has answered
- support reply notification moved to a TicketMessage post_save signal
- global daily cap on paid AI questions (AI_GLOBAL_DAILY_MAX, default 3000)
- Bazaar verify uses only the order's SKU; bazaar orders require a SKU
- /api/health warns on the committed signing key; deploy.sh saves local commits;
  400 for bad ?unit= / ?period=; account delete keeps the referrer's Conversion
- earlier today: no stub answers outside DEBUG, ?grade= removed, logged fallbacks

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

payment/tests_bazaar_pack.py

@@ -66,3 +66,31 @@ class BazaarPackTests(TestCase):
             'userId': str(self.user.id), 'amount': 1, 'provider': 'bazaar', 'planId': '999999',
         }, format='json', HTTP_X_INTERNAL_KEY='internal-test-key')
         self.assertEqual(response.status_code, 400)
+
+
+@override_settings(INTERNAL_SERVICE_KEY='internal-test-key')
+class BazaarSkuComesFromTheOrderTests(TestCase):
+    """تأییدِ بازار SKU را فقط از سفارش می‌گیرد، نه از کلاینت (۲۰۲۶-۱۰-۰۳)."""
+
+    def setUp(self):
+        cache.clear()
+        self.user = User.objects.create(phone='09120007102', is_guest=False)
+        self.client = APIClient()
+        self.client.credentials(HTTP_AUTHORIZATION=f'Bearer {issue_access_token(self.user.id)}')
+
+    def test_a_bazaar_order_needs_a_sku(self):
+        response = APIClient().post('/api/payment/orders', {
+            'userId': str(self.user.id), 'amount': 1000, 'provider': 'bazaar',
+        }, format='json', HTTP_X_INTERNAL_KEY='internal-test-key')
+        self.assertEqual(response.status_code, 400)
+
+    def test_verify_never_uses_the_clients_sku(self):
+        order = Order.objects.create(user_id=self.user.id, amount=259000, provider='bazaar',
+                                     idempotency_key='no-sku-1')
+        with patch('payment.bazaar.verify_purchase') as verify:
+            response = self.client.post('/api/payment/bazaar/verify', {
+                'orderId': str(order.id), 'productSku': 'cheapest', 'purchaseToken': 't'}, format='json')
+        self.assertEqual(response.status_code, 400)
+        verify.assert_not_called()
+        order.refresh_from_db()
+        self.assertEqual(order.status, 'pending')