Replace all console.error calls in MCP services with NestJS Logger instances for consistent structured logging in production. - mcp-hub.service.ts: Add Logger instance, replace console.error in onModuleDestroy cleanup - stdio-transport.ts: Add Logger instance, replace console.error for stderr output (as warn) and JSON parse failures (as error) Co-Authored-By: Claude Opus 4.6 <[email protected]>