Add dispute voting window and quorum requirement to resolve_dispute

[meshackyaro]

Description

resolve_dispute (contracts/trustflow/src/lib.rs, ~line 427) can be called by anyone, at any time, as soon as DisputeVoters(escrow_id) is non-empty — its only gate is voters.is_empty(). There is no minimum quorum and no voting-window deadline. This means a single juror (including one colluding with whoever raised or is defending the dispute) can vote, and the caller can immediately call resolve_dispute before any other honest juror gets a chance to vote — the "tally" at that point is just that one vote, which trivially wins and settles the escrow.

This defeats the entire purpose of a juror pool: the honesty guarantee assumes disputes are decided by a meaningful sample of jurors, not whoever votes and resolves fastest.

Component

Contract

Difficulty

🔴 Hard

Tasks

• Add a dispute_deadline (ledger sequence or timestamp) to DisputeRecord, set when raise_dispute is called
• Add a minimum-quorum requirement (configurable, e.g. via an admin-set DataKey) that resolve_dispute must check alongside the deadline
• Reject resolve_dispute calls before the deadline has passed or before quorum is met, whichever the design settles on (decide: quorum-OR-deadline vs. quorum-AND-deadline)
• Handle the case where the deadline passes with fewer than quorum votes cast (e.g. default ruling, or require a higher juror participation incentive)
• Add contract tests covering: resolve attempted with 1 vote before deadline (should fail), resolve after deadline with sub-quorum votes, resolve after quorum reached before deadline

Acceptance Criteria

• resolve_dispute reverts if called before the voting window closes and quorum has not been met
• Existing dispute-round test helpers (dispute_round in the test module) updated to advance the ledger/timestamp past the deadline where needed
• New tests demonstrate the single-vote early-resolution scenario described above is no longer exploitable
• No regression in existing slashing/tie-break test suite

Estimated Time

3-4 days