Add parsePaginationQuery pure helper

[CemAyyildiz]

Goal

Create a pure function to safely parse limit and offset query params.

Context

server-mvp.ts uses parseInt on query strings; invalid values can become NaN.

Acceptance criteria

• New backend/src/utils/parse-pagination.ts + tests
• Clamps max limit (e.g. 100), floors offset at 0
• No server wiring in this PR

Out of scope

• Cursor pagination
• Changing live endpoint defaults

Conflict rule

New files only.

[AGWAM001]

@AGWAM001 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I'd love to take this issue on. I'm a full-stack developer with experience across Drips Waves4-7.
My stack include rust, Soroban, Solidity, and TypeScript. I can deliver a clean, tested, and well-documented solution within 24 hours of assignment.
Jovial to start immediately

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[dedukpe]

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

please assign

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[VeronicDev]

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

Hello maintainer pls assign

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[drips-wave]

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

🧑‍💻 @dedukpe: 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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[Devadakene]

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

I am experienced enough to implement this issue having worked on similar issues in the past. Please assign

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[karagozemin]

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

can ı work on this?

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[CollinsKRO]

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

Hi, I can fix this kindly assign.

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[drips-wave]

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

🧑‍💻 @karagozemin: 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 🌊