Add tests for /api/risk/evaluate endpoint

[greatest0fallt1me]

Description
Write tests covering the current risk evaluation endpoint, including success and error cases (missing walletAddress, invalid address).

Requirements and context

• Must be secure, tested, and documented
• Should be efficient and easy to review

Suggested execution

• Fork the repo and create a branch
  git checkout -b test/risk-evaluate-endpoint
• Implement changes
  • Add tests using supertest (or similar) for /api/risk/evaluate
  • Cover 200, 400, and other relevant cases
• Test and commit
  • Run tests and include output

Example commit message
test: add coverage for /api/risk/evaluate endpoint

Guidelines

• Minimum 95 percent test coverage for this route
• Clear documentation
• Timeframe: 96 hours
• Project details: creditra-backend

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[Manuel1234477]

@Manuel1234477 has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

Hi Maintainer Can I work on this issue

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[Agbasimere]

@Agbasimere has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

Can i work on this issue?

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[jahrulezfrancis]

@jahrulezfrancis has applied to work on this issue as part of the Stellar Wave Program's 2nd wave.

I'd love to work on adding tests for the /api/risk/evaluate endpoint. I'll use supertest to cover success (200) and error cases (missing/invalid walletAddress), aiming for 95% coverage, and include test output in the PR.

ETA: 2–3 hours.

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