fix: запретить изменение ad_post_url после создания закупа

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

src/dto/placement.py

@@ -60,7 +60,6 @@ class UpdatePlacementInput(pydantic.BaseModel):
     placement_date: datetime.datetime | None = None
     cost: float | None = None
     comment: str | None = None
-    ad_post_url: str | None = None
     status: domain.PlacementStatus | None = None
 
 

src/usecase/placement/update_placement.py

@@ -26,8 +26,6 @@ async def update_placement(
             placement.cost = input.cost
         if input.comment is not None:
             placement.comment = input.comment
-        if input.ad_post_url is not None:
-            placement.ad_post_url = input.ad_post_url
         if input.status is not None:
             placement.status = input.status