fix: catch exceptions during DataApp onSnapshotConsensusResult

[scasplte2]

Summary

Invocation of onSnapshotConsensusResult may throw an exception due to improper error handling by the metagraph developer. If an exception is thrown the underlying consensus process enters a stalled state and the ML0 application must be restarted to recover.

Changes

• Add error handling to log the exception and return an effect for the state advancement

Testing

• Tested against a local metagraph with exceptions during onSnapshotConsensusResult and consensus process is no longer stalled

[marcinwadon]

FYI - there is no need to label PRs since the PR title contains the scope and labels were used for changelog generation (no longer used)