- Convert parallel HTTP port checks to sequential to prevent race conditions
where multiple goroutines could allocate the same available port
- Remove unused 'sync' import since WaitGroup is no longer used
- Add documentation to localhost wrapper functions explaining they are
kept for backwards compatibility and future use
- All gRPC port logic is now exclusively handled in initializeGrpcPortsOnIP
eliminating any duplication in ensureAllPortsAvailableOnIP