[api] Add test coverage for webhooks module (extra 2)

[Mimah97]

Context

Small onboarding task for swyftApi.

Task

Add test coverage for webhooks module

Acceptance criteria

• Jest or Vitest test
• CI passes

Notes

• Keep the PR focused on this task only
• Ask questions in the issue thread if scope is unclear

[Malcolm-Wander]

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

Hello maintainer,I’d love to work on this issue please, …I’ve got some experience ..thank you

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

[Luchistack]

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

I would love to work on this issue

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

[Agencybuilds]

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

i will love to work on this issue , will produce an excellent result

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

[The-Big-Danny]

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

Hi, i'd love to work on this issue.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @The-Big-Danny to this issue.

[Xaxxoo]

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

Hi can I work on this issue ?

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

[drips-wave]

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

🧑‍💻 @Xaxxoo: 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.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊