Feature：start an Operation and Maintenance Centre for oxygent

**Is your feature request related to a problem? Please describe.**
> I'm always frustrated when [Dynamically adjust prompt words, compare the effect of prompt words, network flow limitation, observability]

**Describe the solution you'd like**
> Start an operation and maintenance centre, refer to bytedance's coze-loop, langchain-ai's langsmith

No files, tests, or entry points are named. Begin by surveying the existing project structure and the referenced Coze Loop and LangSmith systems, then define the centre's scope across prompt comparison, network-flow limits, and observability; done requires an agreed design and implementation plan.

Written by the indexing model from the issue text.