Add Notification Schema Compatibility Tests

[Abd-Standard]

Description

Verify that changes to notification payload structures do not unintentionally break supported consumers.

Acceptance Criteria

Representative payloads are tested.

Required fields are validated.

Compatibility failures are reported clearly.

Tests run automatically in CI.

[osaa4]

@osaa4 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I would like to work on this issue because: The core technical problem lies in the domain of multi-step state synchronization and transaction lifecycle preview patterns. I have extensive experience in this specific area, particularly in designing complex multi-stage wizard flows and ensuring form state persistence without triggering premature side effects.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @osaa4 to this issue.

[amanosiadnan-cmyk]

@amanosiadnan-cmyk has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hiii can I work on this issue repo maintainer

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

[drips-wave]

Congratulations, @amanosiadnan-cmyk! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @amanosiadnan-cmyk: 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 🌊