ec9011429c
Review of Task 3: the sink invoke sat before WriteAsync/ForwardAsync inside the best-effort try, so a throwing sink would have silently dropped the durable row. GuardTraceSink wraps the delegate in every helper ctor (and Collect guards EmitTrace); pinned by a throwing-sink test. ScriptRunLauncher no longer allocates a collector for a traced run with no reply target (Nobody) — the list would never be read. FlowTraceCollector.Complete pinned at unit level; Snapshot documented as a non-closing peek. Claude-Session: https://claude.ai/code/session_01NcMG6xXdsJbmD2wYAgkK29