Expose the insecure MsQuic draft API and add an opt-in setting on both
peers. Query the negotiated state after connection establishment so
one-sided opt-in remains encrypted and is logged accurately.
Route input through a dedicated high-priority stream, send pointer
motion as cumulative datagrams, and recover suspected loss reliably.
Reduce downstream input queuing with age-aware coalescing and input
thread scheduling.
Report the exact MsQuic status and initialization stage when network
transport construction or connection fails.
Diagnose certificate, stream, protocol, and peer shutdown failures
instead of returning only the generic transport error.
