[Backend] Implement Notification Delivery Webhook Retries

[Abd-Standard]

Description

Improve webhook reliability by implementing an automatic retry mechanism for failed notification deliveries. The retry strategy should support configurable backoff intervals and prevent duplicate processing.

Tasks
Implement configurable retry policies.
Support exponential backoff.
Track retry attempts and final status.
Log webhook delivery failures.
Prevent duplicate webhook executions.

Acceptance Criteria
Failed webhooks are retried automatically.
Retry limits are configurable.
Duplicate deliveries are avoided.
Retry history is available for debugging.
Contributors start work by running:
git checkout -b backend/webhook-retry-service

[davieslennox0]

I can take a look and provide a solution.
Intrested?

[Ayodaviduiux]

hi maintainer, I'd like to be assigned this issue.

I can implement the webhook retry mechanism with configurable policies, exponential backoff, duplicate prevention, and retry history tracking. Can submit a PR in 1-3 hours if approved.

[victor62-art]

pls assign me to this issue

[grantfox-oss]

🦊 GrantFox — @victor62-art has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #351)
2. Your PR will be reviewed by the Core-Foundry maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@victor62-art's PR #360 was approved and merged by @Abd-Standard.

🏆 @victor62-art: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (891 total points). Track your full progress on GrantFox.

👏 Great work, @victor62-art! Keep contributing to Core-Foundry.