Add creator param not-found shortcut helper

[Chucks1093]

Summary

Add a small helper for quickly returning a not-found result from creator param checks.

Scope

• keep creator not-found shortcut logic in one place
• reduce repeated route-level boilerplate
• make the helper reusable across creator endpoints

Acceptance Criteria

• creator param not-found behavior can be reused
• route handlers become simpler where adopted
• helper stays small and predictable

Contributor note: comment on the issue first and reach out in Telegram for updates or coordination: https://t.me/accesslayerorg

[Belzabeem]

@Belzabeem has applied to work on this issue as part of the Stellar Wave Program's 3rd wave.

I believe i can work on this issue and submit a pr before the end of the day

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[drips-wave]

Congratulations, @Belzabeem! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on March 30, 2026.

🧑‍💻 @Belzabeem: 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

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[Killerjunior]

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

I have carefully gone through the issue and relevant documentation, and I understand the expected implementation. I’d love to work on this task and provide a clean and efficient solution.

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[eliterdav09-creator]

I can take this one. I am adding a small reusable creator-param not-found response helper and adopting it in the existing creator metadata route.

[leocagli]

Interested in working on this one. Please assign me!

[dubemoyibe-star]

@dubemoyibe-star has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I’m interested in taking this issue.

I’ll create a small reusable helper for creator “not found” responses to reduce repetition across routes and keep handlers clean and consistent.

Let me know if I should proceed with this. Thanks!

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[Ghadaffijr]

@Ghadaffijr has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I am an experienced dev and would really love to take this on. Will have the PR ready before the deadline.

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[Chidubemkingsley]

@Chidubemkingsley has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Can i work on this

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[Benedict315]

@Benedict315 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello please assign this issue to me

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