Add unit tests for data-anonymization service

[RUKAYAT-CODER]

Overview

src/common/utils/data-anonymization.service.ts has no accompanying *.spec.ts, so its behaviour is unverified and easy to regress. Add focused unit tests covering the service's public methods, including the main success paths and the error/edge cases.

Specifications

Features:

• The service has unit tests covering its public API.
• Both happy-path and failure/edge-case behaviour is asserted.

Tasks:

• Create src/common/utils/data-anonymization.service.spec.ts with a NestJS Test.createTestingModule setup and mocked dependencies.
• Cover each public method: expected result on success, and error handling on invalid input / dependency failure.
• Ensure the new tests run and pass under the existing Jest config.

Impacted Files:

• src/common/utils/data-anonymization.service.ts
• src/common/utils/data-anonymization.service.spec.ts

Acceptance Criteria

• Every public method of the service has at least one test.
• Success and failure/edge-case paths are both asserted.
• The suite passes in CI.

[yahayaf84771-afk]

@yahayaf84771-afk has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

i would like to work on this issue please

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[DonaldXoftDev]

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

Good day, I'm interested in fixing this issue. Please assign it to me if it's available.

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[onajidavid87-web]

@onajidavid87-web has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi Maintainer, I’d like to work on this issue
I have experience with relevant tech stack and I’ve reviewed the issue description and acceptance criteria, and I’m confident in delivering a clean, tested solution.
Please kindly assign.

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[Ayfataan]

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

Hello Maintainer. I will like to work on this issue .

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[boalambo]

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

Hello maintainer, I would like to work on this issue

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

[drips-wave]

Congratulations, @yahayaf84771-afk! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @yahayaf84771-afk: 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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