Golden-master tests for historical CSV exports

[Miracle656]

Background

Historical-export shape stability matters for downstream analytics.

What to build

Golden CSV files; tests compare against them.

Key files

• tests/historical.golden.test.ts (new)
• tests/fixtures/historical-*.csv (new)

Acceptance criteria

• CSV stable across runs

Drips Wave · Complexity: Easy · 100 points

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[Deywumi-debug]

@Deywumi-debug has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

hey miracle
im deywumi and i would like to work on this project.

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

[drips-wave]

Congratulations, @Deywumi-debug! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

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