Add admin/pause guardian role with emergency_pause to halt slash_on_miss and claim in accountability_vault

[1nonlypiece]

Add admin/pause guardian role with emergency_pause to halt slash_on_miss and claim in accountability_vault

Description

The contract in contracts/accountability_vault/src/lib.rs has no circuit breaker; a dispute or bug cannot pause settlement. Add a guardian address set at create_vault time with emergency_pause/unpause functions that block slash_on_miss, claim, and withdraw while paused. This mirrors the admin dispute tools the backend exposes in src/routes/admin.ts.

Requirements and context

• Must be secure, tested, and documented
• Should be efficient and easy to review
• Add a guardian Address and paused flag to Vault in contracts/accountability_vault/src/lib.rs
• Gate slash_on_miss/claim/withdraw on !paused
• Require guardian auth for pause/unpause
• Add pause/unpause tests in contracts/accountability_vault/src/test.rs

Suggested execution

• Fork the repo and create a branch
• git checkout -b feat/emergency-pause
• Implement changes
  • Modify contracts/accountability_vault/src/lib.rs
  • Add tests in contracts/accountability_vault/src/test.rs
  • Document the guardian role in contracts/README.md
  • Add auth checks for pause functions
• Test and commit
  • Run tests, cover edge cases
  • Include test output and notes

Example commit message

feat: add guardian-controlled emergency pause

Guidelines

• Minimum 95 percent test coverage
• Clear documentation
• Timeframe: 96 hours

[Andreschuks101]

@Andreschuks101 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

This looks like I can resolve immediately. Please assign

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[drips-wave]

Congratulations, @Andreschuks101! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @Andreschuks101: 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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