Refactor Gateway to communicate with external Go Worker service

[Copilot]

This PR refactors the Gateway architecture to correctly implement the Gateway-Worker separation as specified in WORKER-PURPOSE.md. The Worker service is now an external Go application hosted in a separate repository at https://github.com/awesomeapibrasil/gateway-worker.

Changes Made

Removed Internal Worker Implementation

• Removed the entire gateway-worker Rust crate that was incorrectly implemented as part of this repository
• Removed worker-specific configuration files and demo scripts
• Cleaned up workspace dependencies and build configurations

Updated Gateway for External Communication

• Maintained gRPC client functionality in gateway-core for communicating with the external Go Worker service
• Updated protocol buffer definitions to support client-side communication
• Enhanced Worker client with comprehensive gRPC operations for:
  • Certificate management and ACME renewal
  • Configuration updates and validation
  • Log processing and analytics
  • Health monitoring and service discovery

Documentation Updates

• Updated README to reference the external Worker service repository
• Modified integration validation checklist for external service architecture
• Clarified that the Worker service is a separate Go application
• Updated configuration examples to reflect external service communication

Architecture

The Gateway now correctly implements the two-service architecture:

• Gateway Service (This Repository - Rust): High-performance HTTP/HTTPS proxy with real-time WAF processing, load balancing, and routing
• Worker Service (External Repository - Go): Background task processor for certificate management, configuration updates, log processing, and analytics

Communication between services happens via gRPC on port 50051, enabling secure and efficient inter-service operations while maintaining complete separation of concerns.

Benefits

• ✅ Clear separation between real-time Gateway operations and background Worker tasks
• ✅ Independent scaling and deployment of Gateway and Worker services
• ✅ Technology flexibility (Rust for performance-critical Gateway, Go for Worker utilities)
• ✅ Fault isolation - Worker service issues don't impact Gateway performance
• ✅ Simplified maintenance and development workflow

The Gateway service is now ready for integration with the external Go Worker service for production deployment.

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[raniellyferreira]

@copilot você entendeu errado, o gateway-worker sera outro serviço em golang que irá ficar no projeto https://github.com/awesomeapibrasil/gateway-worker

[Copilot]

@copilot você entendeu errado, o gateway-worker sera outro serviço em golang que irá ficar no projeto https://github.com/awesomeapibrasil/gateway-worker

Obrigado pela correção! Entendi o requisito agora. Refatorei a implementação para refletir a arquitetura correta:

✅ Removi o crate gateway-worker em Rust deste repositório
✅ Atualizei o Gateway para se comunicar com o serviço Worker externo em Go
✅ Mantive apenas a funcionalidade de cliente gRPC no Gateway para comunicação com o Worker externo
✅ Atualizei a documentação para referenciar o repositório separado: https://github.com/awesomeapibrasil/gateway-worker

O Gateway agora está configurado para se comunicar com o serviço Worker externo via gRPC na porta 50051. Commit: 590758b