Implement invoice automatic dispute resolution

[Kingsman-99]

Label: complexity: high
Points: 200

Description

Manual dispute resolution requires human arbiters and delays. This issue adds auto_resolve_rules: Vec<ResolveRule> — pre-agreed conditions (e.g. "if funded > 50% release to recipients, else refund payers") evaluated automatically when a dispute is filed, resolving without human intervention.

Technical Context

Involves types.rs — define ResolveRule { min_funded_bps: u32, action: ResolveAction } where ResolveAction is Release or Refund. In lib.rs, add auto_resolve(env, invoice_id) that evaluates rules in order against invoice.funded / total, executing the first matching action.

Acceptance Criteria

• create_invoice() accepts auto_resolve_rules Vec
• auto_resolve() evaluates rules in order and executes first match
• Release action calls _release(), Refund action calls refund logic
• No matching rule panics with "no matching resolution rule"
• Test with 50% threshold verifies release above and refund below
• All existing cargo tests pass
• cargo clippy passes with zero warnings

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[dami-005]

@dami-005 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi maintainer, i would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @dami-005 to this issue.

[drips-wave]

Congratulations, @dami-005! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @dami-005: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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