Add "who moved my cheese" audit log for slot inventory adjustments by admins

[thlpkee20-wq]

Description

Every admin adjustment to slot inventory (create/update/delete) writes an audit row {who, when, before, after, reason} and appears in a searchable admin UI feed.

Requirements and context

• Must be secure, tested, and documented
• Should be efficient and easy to review
• Relevant code: src/routes/admin/slots.ts, src/services/auditLog.ts

Suggested execution

• Fork the repo and create a branch
• git checkout -b feat/slot-inventory-audit
• Implement changes
  • Wrap admin slot handlers in an audit() helper capturing before/after
  • Require reason field on the request body (min 10 chars)
  • Add GET /admin/audit/slots with paginated feed
• Validate security and correctness assumptions

Test and commit

• Run tests
  • npm test
• Cover edge cases
  • missing reason (400), no-op change (skip audit), rollback on downstream failure
• Include test output and security notes

Example commit message

feat: audit log for admin slot changes

Guidelines

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

[Deyanju23]

@Deyanju23 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Can i work on this please?

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Deyanju23 to this issue.

[1nonlypiece]

@1nonlypiece has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi Maintainers 👋,

I’d like to apply for this issue.

I have hands-on experience with Next.js frontend development as well as Stellar smart contracts using Rust (Soroban). I’m comfortable working with Figma designs, integrating APIs/wallets on the frontend, and implementing, testing, and optimizing smart contracts on Stellar.

I can follow the project guidelines, communicate progress clearly, and deliver clean, well-tested code within the expected timeline.

Looking forward to contributing to the project 🚀
Thanks!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @1nonlypiece to this issue.

[drips-wave]

Congratulations, @Deyanju23! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Deyanju23: 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 🌊

[thlpkee20-wq]

Assigned to @Deyanju23 based on their Drips Wave application. This assignment was checked against the limit of 4 active assigned issues without a linked PR across the Chronopay-Org organization. Please open a PR referencing this issue when ready.