Implement webhook delivery health dashboard endpoint

[Abdulazeem-code]

Description

There is no way for admins to see webhook delivery success/failure rates or identify consistently failing webhook URLs.

Proposed Solution

Create GET /api/v1/admin/webhooks/health that aggregates webhook delivery statistics: total registered, actively failing, success rate over last 24h.

Acceptance Criteria

• Admin endpoint created and secured
• Returns count of total, healthy, and failing webhooks
• Includes list of URLs failing for >24 hours
• Filterable by username

Suggested Implementation Areas

src/routes/v1/adminRoutes.js

Impact

Gives operations visibility into webhook reliability and helps identify broken merchant integrations.

[Emmycivity]

@Emmycivity has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

After reviewing the details, I’m confident I can tackle the issue efficiently and deliver a solid solution.Looking forward to it .Thanks

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Emmycivity to this issue.

[adelekevictor12]

@adelekevictor12 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello maintainer, I can fix this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @adelekevictor12 to this issue.

[akinboyewaSamson]

@akinboyewaSamson has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello maintainer, I would love to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @akinboyewaSamson to this issue.

[Olagoke22]

@Olagoke22 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I would like to work on this issue maintainer

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Olagoke22 to this issue.

[drips-wave]

Congratulations, @Olagoke22! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @Olagoke22: 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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