BeamSplit v1.6.2

BeamSplit v1.6.2 keeps the launch film moving while Windows or a child process stalls.

• The complete launch pipeline now runs on a worker thread, including instance repair,
  mod and input deployment, process startup, launcher waits, and window discovery.
• Blocking filesystem/process calls can no longer pin WPF's cinematic render loop.
• Launch telemetry remains live through its thread-safe snapshot channel.
• Integrated-console updates now run below WPF render and input priority, so bursts of
  BeamMP or BeamNG output cannot starve animation frames.
• The sustain loop remains time-based: delayed frames catch up smoothly instead of
  leaving the blocks frozen at an old position.

Validation: Release and portable publish completed with 0 warnings and 0 errors. The
shipping EXE passed the complete headless test suite, including zero-copy mod junctions,
BeamMP client patching and auto-join, audio isolation, window-layout regressions, and the
full real-machine setup checklist. The active BeamNG session was left untouched.