Introduce a middleware layer to attach a unique identifier to each HTTP request for observability purposes. The identifier is propagated via the X-Request-ID header, allowing for correlation of logs and events across distributed system components.
- Replace direct zerolog usage with standard library `log/slog` in business code
- Add `internal/logging` package with zerolog bridge handler for structured output
- Create `internal/jsoncodec` package to centralize JSON encoding/decoding using Sonic
- Update all services and main entry point to use new logging interface
- Maintain backward compatibility with existing zerolog console output
- Remove custom logger setup in favor of structured logging bridge
- Integrate `rs/zerolog` for structured and leveled logging
- Add `EZ_LOG_LEVEL` environment variable support (default: info)
- Configure console output with timestamps and service fields
- Migrate `main.go` and `LogWriter` to use the new logger instance
- Update README with logging configuration and design details
- Move integration tests and mock upstream resources from `integration/` to `test/` directory.
- Add `test/integration.sh` script to orchestrate environment setup and test execution.
- Update build context in `docker-compose.integration.yml` to match new structure.
- Add documentation for local development and integration testing workflows in README.
Replace placeholder with comprehensive documentation including:
- System goals and control plane responsibilities
- Architecture design and technology stack
- API endpoint reference for management and system interfaces
- Configuration variables and default values
- Deployment instructions for local and Docker environments
