Windows Build 4

Fix Windows CI: extract NDI SDK instead of running its installer

Unblock-File wasn't enough — the installer still hung indefinitely,
most likely on the UAC elevation prompt Inno Setup admin installs
require, which nothing can click in a non-interactive CI session.
Use innoextract to pull the SDK contents directly out of the
installer archive instead of executing it at all, sidestepping both
that and the SmartScreen prompt entirely. Verified locally that
innoextract's output layout (app/Include, app/Lib/x64, app/Bin/x64)
matches exactly what binding.gyp already expects.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>