feat: fetch views manually and worker

src/usecase/views/update_views_manually.py

@@ -11,7 +11,6 @@ log = logging.getLogger(__name__)
 
 
 async def update_views_manually(self: 'Usecase', input: dto.UpdateViewsManuallyInput) -> dto.PurchaseOutput:
-    """Ручное обновление просмотров для закупа."""
     async with self.database.transaction():
         purchase = await self.database.get_purchase(input.user_id, input.purchase_id)
         if not purchase:
@@ -20,13 +19,11 @@ async def update_views_manually(self: 'Usecase', input: dto.UpdateViewsManuallyI
 
         fetched_at = datetime.datetime.now(datetime.UTC)
 
-        # Обновляем метрики закупа
         purchase.views_count = input.views_count
         purchase.views_availability = domain.PostViewsAvailability.MANUAL
         purchase.last_views_fetch_at = fetched_at
         await self.database.update_purchase(purchase)
 
-        # Создаём снимок
         snapshot = domain.ViewsSnapshot(
             purchase_id=purchase.id,
             views_count=input.views_count,
@@ -36,7 +33,6 @@ async def update_views_manually(self: 'Usecase', input: dto.UpdateViewsManuallyI
 
         log.info('Views manually updated for purchase %s: %d', purchase.id, input.views_count)
 
-        # Возвращаем обновлённый закуп
         return dto.PurchaseOutput(
             id=purchase.id,
             target_channel_id=purchase.target_channel_id,