Add live chat notification support

[MaryammAli]

Description: Add backend event publisher for chat notifications.
- Path: BackendAcademy/src/chat/

[TS-mfon]

@TS-mfon has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Gm

Please can I work on this issue

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

[DevMuhdishaq]

@DevMuhdishaq has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi Maintainer,

I’m a full-stack developer, and I’d like to contribute to the task. I’ll implement it carefully and efficiently thoroughly understand requirements and edge cases
Communicate promptly about suggestions or improvements. And I will provide regular progress updates and address blockers
Align with project goals through feedback and clarification.

Thank you,

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

[amankoli09]

@amankoli09 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Can i work on this issue PR merge within 1hr

ℹ️ Repo Maintainers: To accept this application, review their application or assign @amankoli09 to this issue.

[drips-wave]

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

🧑‍💻 @Ericoluchukwu: 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 🌊