[engine] Automatic Soroban SDK version detection and deprecation warnings

[Gbangbolaoluwagbemiga]

Context

The Soroban SDK evolves rapidly. Flag usage of old/insecure patterns.

[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

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[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

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🌊 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 addressed the issue in PR #484, which was merged by maintainers. The PR includes the requested Soroban SDK version detection and deprecation warning logic in the new sdk_version.rs module.

😎 @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.