Problem: no acknowledgement detail in ica callback

smart contract could get more detail when receives callback `onPacketResult` instead of a simple boolean indicating success or failure.

Start by tracing the smart-contract callback entry point named `onPacketResult` and inspect how its current boolean acknowledgement is produced and consumed. Clarify which additional acknowledgement details are required and identify the relevant callback tests or integration coverage; done should be defined by an agreed callback contract and passing coverage.

Written by the indexing model from the issue text.