Task 10.1: API Gateway Service Implementation

[kluth]

Phase: 10 - Showcase Application (Lower Priority)

Tags: feature, showcase, api

Description:
Create project structure, implement HTTP/REST, GraphQL, gRPC, add rate limiting, CSP, compression, and write integration tests.

Acceptance Criteria:

• Create project structure
• Implement HTTP/REST
• Implement GraphQL
• Implement gRPC
• Add rate limiting
• Add CSP
• Add compression
• Write integration tests