KYC/KYB Document Upload & Verification API

[Olowodarey]

Financial and healthcare applications have strict KYC (Know Your Customer) requirements. We need an API layer to accept identification documents.

Acceptance Criteria

• Implement POST /users/me/kyc-docs accepting secure file uploads.
• Configure file parsing limits strictly (e.g., max 10MB PDF/JPEG only).
• Update the user's kycStatus field to PENDING in the database.
• Create an admin endpoint PATCH /admin/users/:id/kyc to approve/reject the submission.

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