**Enhancement: add badge awarding rules that are conflict-safe and idempotent**

[MaryammAli]

• Description: Badge issuance should not create duplicates or inconsistent state when the same achievement is processed multiple times.
  • Impacted files: BackendAcademy/src/badges/badges.service.ts, BackendAcademy/src/rewards/rewards.service.ts, BackendAcademy/src/notifications/notifications.service.ts, BackendAcademy/src/analytics/analytics.service.ts

[eulami]

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

Hi. I am conversant with these kind of issues and can deliver a good PR within 24 hours. Kindly assign it to me.

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[drips-wave]

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

🧑‍💻 @eulami: 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.

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[Caneryy]

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

Hello, please can I work on this issue?

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