Assistant MCP (Mock, Phase 1)

MCP endpoint : POST https://mphome.taild9ca3f.ts.net/mcp
Discovery    : https://mphome.taild9ca3f.ts.net/.well-known/oauth-protected-resource/mcp
Health       : https://mphome.taild9ca3f.ts.net/healthz

Mock-Server (Phase 1). Nur ping/echo, keine echten Tools.