Attach request validation middleware globally

[hman38705]

Issue 004: Attach request validation middleware globally

Area: Backend
Priority: High
Files: services/api/src/main.rs, services/api/src/validation.rs

Problem

Query and path validation middleware is defined but not applied to all route groups. Suspicious payloads can reach handlers unfiltered.

Acceptance Criteria

• Suspicious query/path payloads are rejected with 400\n- Safe traffic is unaffected\n- Integration tests cover blocked and allowed cases\n- Validation rules are documented

[chidii]

@chidii has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Good day I am a full stack developer with over 6 years of experience and I very strong in backend from what I see Attach request validation middleware globally won't be a problem kindly assign this to me let me resolve it

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

[whitezaddy]

@whitezaddy has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hello Maintainer. This is my specialty. Kindly assign the job to me, thanks.

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

[Macnelson9]

@Macnelson9 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hi, can I work on this issue please? I will deliver timely and efficiently. ETA: 1hr

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Macnelson9 to this issue.

[drips-wave]

Congratulations, @Macnelson9! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

🧑‍💻 @Macnelson9: 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 🌊

[drips-wave]

This issue has been completed by @Macnelson9 as part of the Stellar Wave Program's 4th Wave 🥳

😎 @Macnelson9: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.