Document safe synthetic test data for contributors

[aoiminamoto]

Problem

KinaBot's contribution rules correctly prohibit publishing participant audio, transcripts, personal data, credentials, or production exports. A new contributor still needs concrete examples of how to create safe synthetic inputs for bug reports, tests, screenshots, and documentation.

Desired outcome

Add docs/SYNTHETIC-TEST-DATA.md, a short practical guide showing contributors how to create clearly fictional, non-clinical test material without copying or lightly editing real participant data.

Acceptance criteria

• Explain the difference between synthetic, anonymized, pseudonymized, and redacted data in plain language.
• State that anonymization or removing names may still leave voice and language data identifiable.
• Include one short, clearly fictional text example for each currently supported language: English, Japanese, and Chinese.
• Include safe examples for a bug report, automated unit test, screenshot, and sanitized log.
• Include a “never include” checklist covering audio, transcripts, email addresses, participant IDs, credentials, medical details, local databases, and production exports.
• Explain what to do if a bug can only be reproduced with sensitive data: stop, do not upload it, and use the private path described in SECURITY.md.
• Link the new guide from CONTRIBUTING.md.
• Use no real participant or production data in the contribution.
• Pass git diff --check and the repository's existing CI.

Scope guidance

This is a repository-root documentation-only task. It must not modify aoi_kinabot_app/, which is protected by the Aoi-maintained authorship boundary. It does not require changing the application, collecting data, generating realistic voice recordings, or making legal/compliance claims. Keep the guide concise and usable by a first-time contributor.

Helpful starting points

• CONTRIBUTING.md
• SECURITY.md
• existing synthetic examples in the Python tests

Before starting, leave a short comment so another contributor does not duplicate the work. A maintainer can clarify scope in the issue.

[DarthAmk97]

I’m taking this documentation-only guide. I’ll base it on the latest main, keep it to docs/SYNTHETIC-TEST-DATA.md plus the requested CONTRIBUTING.md link, avoid aoi_kinabot_app/, and use only clearly fictional data.

[aoiminamoto]

Thank you, @DarthAmk97 — welcome, and please go ahead.

One scope clarification: the issue was updated after the new Aoi-maintained application boundary was defined. Please:

• add docs/SYNTHETIC-TEST-DATA.md;
• link it from the repository-root CONTRIBUTING.md;
• do not modify anything under aoi_kinabot_app/;
• use only clearly fictional data and no adapted participant material.

Please base your work on the latest main after PR #45 is merged, because that PR updates the contribution policy and CONTRIBUTING.md.

Your documentation contribution will be credited in the issue, pull request, and relevant release notes. Thank you for helping make safe contribution practices easier for newcomers.