v1.0.10-beta.3

[1.0.10-beta.3]

Fixed

• Pi 3 hardware video decode broken by low GPU memory — the setup
  script was setting gpu_mem=16 MB which prevented VideoCore IV from
  loading the H.264 codec firmware, forcing VLC into 100 % CPU software
  decode even with correctly‑transcoded Level 4.0 files. Raised to
  gpu_mem=128 MB for Pi 2/3 (Pi 4/5 use kernel‑managed CMA and don't
  need this).
• Infinite re‑transcode loop on Pi 5 — CRF encoding produced files
  ~3 Mbps above the profile bitrate limit, triggering a re‑transcode on
  every reboot that produced the same overshoot. needs_optimisation()
  now allows 10 % tolerance on bitrate checks.
• Frame‑extraction ffmpeg processes not throttled — first‑frame,
  last‑frame, and thumbnail extraction ran under nice only, ignoring
  the CPU throttle setting. Now uses _wrap_with_throttle() so they
  also get cpulimit when CPU throttling is enabled.
• Missing gpu_mem on Pi 4/5 Trixie images — some images ship
  without any gpu_mem line in config.txt; the setup script now
  adds gpu_mem=128 when the setting is absent.

Changed

• Setup script GPU memory — gpu_mem=128 (was 16) for new
  installs; existing installs are auto‑upgraded from <128 or have
  the setting added if missing entirely