forge-governor — add test verifying get_vote_tally() returns correct abstain_votes field

[Austinaminu2]

Summary

VoteTally now includes abstain_votes but no test explicitly verifies this field is populated correctly after abstain votes are cast. The existing tally tests likely pre-date the abstain feature.

Tasks

• Create a proposal
• Cast 60 For votes, 30 Against votes, 10 Abstain votes (from different voters)
• Call get_vote_tally() and assert:
  • yes_votes == 60
  • no_votes == 30
  • abstain_votes == 10
  • total_votes == 100
• Verify get_vote_tally() on a proposal with no votes returns all zeros
• Verify get_vote_tally() on a non-existent proposal returns ProposalNotFound

Labels: testing, forge-governor