Merge: from profiling_improvements - New: experimental perfsnapshot_stream [Name, MainCap(MB), WorkerCap(MB), Debug] server command that streams perf data into a user-defined buffer. Limited to 256MB per thread. Stable up to 32MB, past that might fail to export. - New: profile.quiet persistent server-var - controls whether perfsnapshot commands notify chat of incoming stutters - Bugfix: fix snapshots failing to export in standalone(introduced yesterday to staging) Tests: build tests, unit tests, taking snapshots in editor, and snapshots in standalone server build