(fix): compact payload escape, Draft.push validation, plugin logger ownership, worker StopAndWait, getChatLimiter deadlock, runner ctx-after-tick (refactor): remove NewPayload, buildSceneKey from sceneRuntime, unify ToJSON fallback (tests): compact round-trip, Draft.push state, RateLimiter.Cleanup eviction (doc): changelog v1.0.0 rewrite, NewCommand dual-use godoc