Delete Azure Vault secrets async (#3716)

skyvern/forge/sdk/routes/credentials.py

@@ -205,6 +205,7 @@ async def create_credential(
     include_in_schema=False,
 )
 async def delete_credential(
+    background_tasks: BackgroundTasks,
     credential_id: str = Path(
         ...,
         description="The unique identifier of the credential to delete",
@@ -226,6 +227,9 @@ async def delete_credential(
 
     await credential_service.delete_credential(credential)
 
+    # Schedule background cleanup if the service implements it
+    background_tasks.add_task(credential_service.post_delete_credential_item, credential.item_id)
+
     return None