- Remove TCP listener support from gRPC server; Unix socket is now the
only transport for the admin API (access controlled via filesystem
permissions)
- Add standard gRPC health check service (grpc.health.v1.Health)
- Implement MCPROXY_* environment variable overrides for config
- Create client/mcproxy package with full API coverage and tests
- Update ARCHITECTURE.md and dev config (srv/mc-proxy.toml)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>