Optimize caches and workflow runs

Editor assessment

The verb optimize carries no specifics: CI caches and workflow runs were optimized, with a meaningful ci scope, but neither the mechanisms (cache keys, path pruning, concurrency limits) nor the gains appear anywhere. The perf type is apt for the intent. No body exists to quantify or even enumerate the optimizations, and no footers appear. Hygiene is clean. The message accurately signals the category of change while documenting none of its content, leaving a reader to reconstruct the actual improvements from the diff.