fix: backup import crash + upload handler hardening

- Fix PaypearPayment → PayPearPayment (capital P) — import crash
- Fix AurapayPayment → AuraPayPayment (capital P) — import crash
- Update upload instruction message to mention .tar.gz format
- Add null guard on document.file_name before extension check

app/handlers/admin/backup.py

@@ -313,7 +313,7 @@ async def restore_backup_start(callback: types.CallbackQuery, db_user: User, db:
     else:
         text = """📥 <b>Восстановление из бекапа</b>
 
-📎 Отправьте файл бекапа (.json или .json.gz)
+📎 Отправьте файл бекапа (.json, .json.gz или .tar.gz)
 
 ⚠️ <b>ВАЖНО:</b>
 • Файл должен быть создан этой системой бекапов
@@ -393,7 +393,7 @@ async def handle_backup_file_upload(message: types.Message, db_user: User, db: A
     document = message.document
     allowed_extensions = ('.json', '.json.gz', '.tar.gz', '.tar')
 
-    if not any(document.file_name.endswith(ext) for ext in allowed_extensions):
+    if not document.file_name or not any(document.file_name.endswith(ext) for ext in allowed_extensions):
         await message.answer(
             '❌ Неподдерживаемый формат файла. Загрузите .json, .json.gz или .tar.gz файл',
             reply_markup=InlineKeyboardMarkup(

app/services/backup_service.py

@@ -31,7 +31,7 @@ from app.database.models import (
     AdminRole,
     AdvertisingCampaign,
     AdvertisingCampaignRegistration,
-    AurapayPayment,
+    AuraPayPayment,
     BroadcastHistory,
     ButtonClickLog,
     CabinetRefreshToken,
@@ -61,7 +61,7 @@ from app.database.models import (
     Pal24Payment,
     PartnerApplication,
     PaymentMethodConfig,
-    PaypearPayment,
+    PayPearPayment,
     PinnedMessage,
     PlategaPayment,
     Poll,
@@ -200,10 +200,10 @@ class BackupService:
             KassaAiPayment,
             RioPayPayment,
             SeverPayPayment,
-            PaypearPayment,
+            PayPearPayment,
             RollyPayPayment,
             OverpayPayment,
-            AurapayPayment,
+            AuraPayPayment,
             SavedPaymentMethod,
             # --- Settings/content ---
             PaymentMethodConfig,