Implement voting mechanism for dispute resolution

[big14way]

Instead of admin-only resolution, allow members to vote on disputes.

Acceptance Criteria:

• Add vote_on_dispute(member, group_id, approve) function
• Configurable quorum (e.g., >50% of members)
• Auto-resolve when quorum reached

Files: contracts/sorosave/src/admin.rs, contracts/sorosave/src/types.rs

[WuXieSec]

/attempt #14

I’m taking this bounty and will submit a PR shortly.

Plan:

1. Add vote_on_dispute(member, group_id, approve) entrypoint
2. Add configurable quorum threshold (>50% default)
3. Auto-resolve dispute once quorum is reached
4. Add tests for approve/reject paths and quorum edge cases

Payout preference: PayPal (wuxiesec@gmail.com) after merge verification.

[WuXieSec]

Update: implemented dispute voting + configurable quorum and opened PR for review.

PR: #81

Included in this PR:

• vote_on_dispute(member, group_id, approve)
• set_dispute_quorum(admin, group_id, quorum_bps)
• per-dispute vote tracking + per-member anti-double-vote marker
• automatic resolution when approval/rejection quorum is reached
• cleanup of dispute/vote storage on resolution
• test case for quorum auto-resolve flow

Note: I could not run Rust tests in this environment because cargo is unavailable here.

[justwe-bot]

Requesting assignment/consideration for this bounty if it is still bounty-eligible. I opened PR #140: #140

The PR implements member dispute voting, configurable quorum, automatic resolution when approving votes exceed quorum, and includes verification in the PR body.