Documents what the rig proved and what it found, adds the hardware sign-off
script for the Hyprland machine and an (untested) Windows validation script,
and updates CI to build the cached OBS runtime, run tests and lint the Windows
code paths.
Runs encoder verification, Wayland and X11 capture with segment and remux
checks, and five failure scenarios that must end in an honest failed status:
source lost, window closed, unwritable segments, low disk space and a portal
that grants no source.
harry