Build invoice payment webhook replay tool

[Kingsman-99]

Label: complexity: high
Points: 200

Description

src/webhook.ts's triggerWebhook fires once; if a receiving endpoint was down, there's no built-in way to replay a specific historical webhook event. This issue adds a replay capability backed by a local event log.

Technical Context

Extend src/webhook.ts area with src/webhookReplay.ts. Persists fired webhook payloads (in-memory ring buffer by default, pluggable store) keyed by event ID, exposes a replay(eventId) to re-trigger.

Acceptance Criteria

• Fired webhooks are recorded with a unique event ID and timestamp
• replayWebhook(eventId) re-sends the exact original payload
• Ring buffer has a configurable max size, evicting oldest entries
• Tests: replay produces identical payload to original; eviction works at buffer capacity

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[Glam26]

I'd be happy to take this on.

I've worked on similar issues across multiple open-source and production projects, including feature development, refactoring, testing, documentation, performance improvements, and bug fixes. My approach is to first understand the existing architecture and conventions, then deliver a solution that is clean, maintainable, and aligned with the project's standards.

I'll make sure the implementation is thoroughly tested, well-documented where necessary, and covers relevant edge cases. I'm comfortable collaborating during review, incorporating feedback quickly, and ensuring the final result is production-ready.

[Glam26]

I'd be happy to take this on.

I've worked on similar issues across multiple open-source and production projects, including feature development, refactoring, testing, documentation, performance improvements, and bug fixes. My approach is to first understand the existing architecture and conventions, then deliver a solution that is clean, maintainable, and aligned with the project's standards.

I'll make sure the implementation is thoroughly tested, well-documented where necessary, and covers relevant edge cases. I'm comfortable collaborating during review, incorporating feedback quickly, and ensuring the final result is production-ready.