feat: harden stale and failure handling #20

Merged@github-anthodev wants to merge feature/harden-failures/reliability/8 into develop

Merged as 835b18ba053b.

@github-anthodev opened this merge request · Sep 12, 2026
Bound useful stale departures independently from the fresh cache TTL, expose credential-free quota counts, and lock failure, key lifecycle, rapid navigation, and soak behavior with tests.

Closes #8