Note

Replaces panics on total voting power overflow with error returns, adds a safe accessor, and updates callers and tests accordingly.

• types/validator_set.go:
  • updateTotalVotingPower now returns error instead of panicking on overflow; propagates error where applicable.
  • Added TotalVotingPowerSafe() to compute/return total voting power or an error.
  • TotalVotingPower() now panics only if updateTotalVotingPower() returns an error.
  • Updated callers: updateWithChangeSet, ValidatorSetFromProto, and ValidatorSetFromExistingValidators to handle/propagate errors.
• tests (types/validator_set_test.go):
  • Added TestValidatorSetFromProtoReturnsErrorOnOverflow.
  • Adjusted tests to handle new error-returning behavior (e.g., checking require.NoError from updateTotalVotingPower).

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