Merge pull request code-dot-org#26693 from code-dot-org/moderate-deleted-project

recover gracefully when admin views deleted project

Author: davidsbailey

shared/middleware/helpers/storage_apps.rb

@@ -210,7 +210,7 @@ def content_moderation_disabled?(channel_id)
     _owner, storage_app_id = storage_decrypt_channel_id(channel_id)
 
     row = @table.where(id: storage_app_id).exclude(state: 'deleted').first
-    raise NotFound, "channel `#{channel_id}` not found" unless row
+    return false unless row
 
     row[:skip_content_moderation]
   end