Create Architecture Decision Records

[Abd-Standard]

Description:
Introduce ADRs documenting important architectural decisions in NotifyChain and the reasoning behind them.

Acceptance Criteria:

ADR format is defined.
Major architectural decisions are documented.
Contributors can add future decisions consistently.

[0xNinx]

@0xNinx has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

Hi, I’d like to work on this issue. I’ve reviewed the requirements and would be happy to take it on. Please assign it to me. Thank you!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @0xNinx to this issue.

[drips-wave]

Congratulations, @0xNinx! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on September 30, 2026.

🧑‍💻 @0xNinx: 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 🌊