[866] [INDEXER] Custom Webhook Retry Policy with Exponential Backoff & Circuit Breaker

[orunganiekan]

Summary

Implements a resilient webhook dispatch system with background processing, retry handling, dead-letter storage, and destination-level circuit breaking.

What Changed

• Added BullMQ/Redis-backed background webhook dispatching.
• Added up to 5 retry attempts for failed webhook deliveries.
• Added exponential backoff with jitter to reduce retry storms.
• Added dead-letter handling for deliveries that permanently fail.
• Added webhook destination failure tracking.
• Added a rolling 1-hour failure-rate evaluation window.
• Added circuit-breaker behavior that disables destinations when failure rates exceed 95%.
• Added protection against repeatedly dispatching to unhealthy destinations.
• Added tests covering retries, backoff, jitter, dead-letter handling, failure-rate calculation, and circuit-breaker behavior.

Testing

• Ran webhook/indexer unit tests.
• Ran the applicable broader test suite.
• Verified successful delivery and failure/retry paths.

Issue

Closes #866

[vercel]

@cursoragent is attempting to deploy a commit to the Ayomide Adeniran's projects Team on Vercel.

A member of the Team first needs to authorize it.

[drips-wave]

@orunganiekan Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits