feat: проверка существования канала при привязке

src/usecase/placement/update_placement.py

@@ -39,21 +39,11 @@ async def update_placement(
 
     await self.database.update_placement(placement)
 
-    # Compute post-related fields
     ad_post_url = None
-    views_count = None
-    views_availability = domain.PostViewsAvailability.UNKNOWN
-    last_views_fetch_at = None
 
     if placement.post:
         ad_post_url = generate_post_url(placement.post.channel.username, placement.post.message_id)
 
-        # Get latest views data
-        views_data = await self.database.get_latest_views_data(placement.post.id)
-        if views_data:
-            views_count, last_views_fetch_at = views_data
-            views_availability = domain.PostViewsAvailability.AVAILABLE
-
     return dto.PlacementOutput(
         id=placement.id,
         project_id=placement.project_id,
@@ -70,8 +60,5 @@ async def update_placement(
         invite_link=placement.invite_link,
         status=placement.status,
         subscriptions_count=placement.subscriptions_count,
-        views_count=views_count,
-        views_availability=views_availability,
-        last_views_fetch_at=last_views_fetch_at,
         created_at=placement.created_at,
     )