Extract cache info to separate files and add more mutations

Editor assessment

`refactor: extract cache info to separate files and add more mutations` states both actions — extraction and added mutations — concretely, legible without the diff. Refactor fits a restructure, and no scope marks the store or cache area, minor. No body explains the motivation, such as reducing file size or clarifying responsibilities, the instructive rationale, but the subject enumerates the changes fully. Imperative verb, no trailing period, tidy. Clear, correct, and self-contained: a publishable example with a minor rationale gap.