Bugfix: ContinuousProfiler now atomically updates it's write indices - internal fix in ServerProfiler.Core, based on e39afb43 - Removed now-unhelpful echeck for right mark type at the start of main thread perf stream (all cases confirmed legal now) After soaking it for 15 minutes total, only main thread export gets lost in the binary sauce. Hopefully last bug. Tests: soaked 3 times on craggy, only hit unexpected mark type on main thread