API key flow: Bereken je Recht (TypeScript)

[rubenhensen]

Summary

Implement an API key flow for the Bereken je Recht use case, where PostGuard handles the full sending flow including emailing both HHNK and the citizen.

Flow

1. Bereken je Recht sends a request using an API key
2. PostGuard handles the encryption and sends emails to both:
   • HHNK (the organization)
   • The citizen who initiated the request

Key design decisions

• PostGuard handles the full email sending in this flow
• Communication is authenticated via API key
• Two recipients per request: the organization (HHNK) and the citizen

Dependencies

• Example TypeScript project for Bereken je Recht (Example project: TypeScript implementation for Bereken je Recht #81)