cd3368fc71
Goal 3: the IDD-push hot-loop KeyedMutexGuard (6585643) landed, and the whole session's Windows + driver work is now ON-GLASS BUILD-VALIDATED on the RTX box — host clippy -D warnings clean + driver build clean (the gate that surfaced + got 11 lints fixed inbd05bc8). Only the deferred host P0 lints + the deliberately- left service.rs SCM-handler event smuggling remain, plus an optional latency A/B. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>