Engineer Webhook Delivery Guarantee with Dead Letter Queue for Failed Events

[temma02]

Description

Implement a webhook delivery guarantee system with a dead letter queue that captures and enables reprocessing of webhook events that fail to process after exhausting retries.

Requirements and Context

• Reliability: No webhook event should be silently lost
• Testing: Test DLQ capture and reprocessing
• Documentation: Document the DLQ workflow

Suggested Execution

Branch: feat/issue-065-webhook-dead-letter-queue

Implement Changes

• Add a dead letter store for webhook events that exhaust retries
• Capture the full event payload and failure reason in the DLQ
• Add an admin endpoint to inspect and reprocess DLQ entries
• Apply DLQ handling to both Stripe and GitHub webhook processors

Test and Commit

• Test that failed events land in the DLQ after retry exhaustion
• Test reprocessing of a DLQ entry
• Document the DLQ workflow

Example Commit Message

feat(webhooks): add dead letter queue for failed webhook events

- Capture failed events with payload and failure reason
- Add admin endpoint for DLQ inspection and reprocessing
- Apply DLQ handling to Stripe and GitHub webhooks

Guidelines

• Store the full original payload for accurate reprocessing
• Protect the DLQ admin endpoint with proper authorization
• Avoid infinite reprocessing loops

[job-soft]

@job-soft has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I WOULD LOVE TO WORK ON THIS TASK ALONG SIDE YOU SIR.

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Congratulations, @job-soft! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

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This issue has been completed by @job-soft as part of the Stellar Wave Program's 5th Wave 🥳

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