Hold the host frame step at 30 fps while iOS reports serious or critical
thermal pressure, and restore its configured cap after 30 calm seconds.
Keep the existing movie cap and DM_THERMAL_CAP=0 override.
Sample thermal state independently of movies and configured 30 fps targets
so heating resets recovery and cooling counts during playback. Serialize
the sample, cached cap and recovery timer across acquire/present readers.
The original PR failed five timing checks and ThreadSanitizer detected a
race through concurrent production cap getters.
Add controlled-clock production-path regressions and CI coverage, including
disabled/inactive caps and ThreadSanitizer. Record the shared mechanism
and validation limits in the frame-rate reference and BotW note.
Validated on latest main with the BotW profile: 24 thermal checks normally
and under ThreadSanitizer, 51 frame-step checks, 154 NVN checks, the
present-snapshot suite, 21 tool/docs checks, Mac host build, and iOS compile
check (133 sources). No new device gameplay or thermal recovery run.
Co-authored-by: v0lumehi <aljic.zijad@gmail.com>
