[engine] Rule: Require explicit event emission for privileged state changes

[Gbangbolaoluwagbemiga]

Context

Changing admin or pausing without events breaks off-chain data integrity.

What to build

Implement S014 (Missing State Event). Detect changes to privileged keys without events.

[Nanle-code]

@Nanle-code has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

let me work on this

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

[drips-wave]

Congratulations, @Nanle-code! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

🧑‍💻 @Nanle-code: 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.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[drips-wave]

This issue has been marked as completed by a Drips Wave moderator for @Nanle-code as part of the Stellar Wave Program's 3rd Wave 🥳

Moderator's reason: [Auto-assessed] The contributor successfully implemented the requested security rule (Missing State Event) in PR #484. Although the issue remains open, the PR was merged by maintainers and explicitly references the issue, providing a complete implementation with tests.

😎 @Nanle-code: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.

ℹ️ Note: This issue was marked complete via moderation. Points were issued even though the GitHub issue remains open.