Before deleting a duplicate check, make the remaining one visible

When you remove a duplicated limit check (for example a size cap checked both in the RPC handler and inside the storage layer), first make sure the check that stays reports its failure. Here the store already rejected oversized values, but the RPC handler threw the store's error away, so deleting the handler's check first would have turned oversized writes into a silent ERROR. Order that worked: (1) log store errors with the request ID at the replica, then (2) delete the handler's copy and point every other literal at one owner (store.MaxValueSize, transport.OperationTimeout). Also, when you delete a constant, run vet to catch imports that only it used (here 'time'). Use git rm for files that held only a package clause, and remember those deletions are already staged when you commit the rest.