fix(folders): route the delete lock check through the locking capability

The DELETE handler was the one branch still testing resourceType directly
after locking became a declared capability, so a future lockable resource
would silently skip the mutable check on delete.

Author: waleedlatif1

apps/sim/app/api/folders/[id]/route.ts

@@ -166,7 +166,7 @@ export const DELETE = withRouteHandler(
         )
       }
 
-      if (resourceType === 'workflow') {
+      if (folderResourceConfig(resourceType).supportsLocking) {
         await assertFolderMutable(id)
       }