64KB Range fetch from a fixed episode (JJK S2 E25) on a daemon thread; logs '[probe] CDN OK/DEGRADED (N KB/s)' on state change so server.log shows exactly when a degraded window ends. 18/18 tests, verified live.
64KB Range fetch from a fixed episode (JJK S2 E25) on a daemon thread; logs '[probe] CDN OK/DEGRADED (N KB/s)' on state change so server.log shows exactly when a degraded window ends. 18/18 tests, verified live.