Backend: Add WebSockets for Real-Time Payment Notifications

[Abdulazeem-code]

Integrate socket.io or native WebSockets into server.js. When the horizonListener.js detects a new incoming payment for a registered user, push a real-time notification event to the specific authenticated client connection.

[Martins-594]

@Martins-594 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi, I'd like to work on this issue. I've gone through the description and acceptance criteria and I'm confident I can deliver it. I'll make sure every acceptance criterion is met and submit a clean, tested PR. Please assign it to me.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Martins-594 to this issue.

[Lacastar2000]

@Lacastar2000 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hey boss. I would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Lacastar2000 to this issue.

[RedheadedProgrammer]

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

i would like to apply to this

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

[drips-wave]

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

🧑‍💻 @RedheadedProgrammer: 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 🌊