[CONTRACT] Create get_ledger_version Function

[Sadeequ]

Goal: Help the frontend track contract compatibility.

Description: A public function that returns the current protocol version of the contract.

Task: Useful for ensuring the backend is talking to the right version of the Oracle.

[JosephOnuh]

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

Hi maintainer,

I’d like to work on this to help ensure frontend and backend compatibility through clear version tracking. I have experience building smart contract read functions and writing tests.

Thank you!

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

[drips-wave]

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

🧑‍💻 @JosephOnuh: 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 🌊