Add a consolidated GDPR subject-data export

[RUKAYAT-CODER]

Background

There is no single export of a user's data for subject-access requests. Add one that aggregates the relevant stores.

Files to modify (2-3)

src/lib/consent/api.ts
src/lib/export/index.ts

Acceptance Criteria

Implemented across the listed files

Unit/integration tests added or updated and passing

No regression; follows project coding standards

[mazzam2006]

@mazzam2006 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Give me a shot at this.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @mazzam2006 to this issue.

[0xApana]

@0xApana has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, maintainer i'll like and appreciate to work on this.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @0xApana to this issue.

[drips-wave]

Congratulations, @mazzam2006! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @mazzam2006: 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

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