5-level fidelity manager (L0-Full to L4-Evicted) with helper LLM
(Haiku 4.5) for intelligent summarization during degradation.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
