daedalus-v4l2: 5d8b436 -> 77e14e5 — picks up #12 (LOW_DELAY) + #13 (daedalus-fourier linkage)

Daemon-only bump (no daedalus-v4l2-dkms change needed; PROTO_VERSION
stays at 0).

#12 (LOW_DELAY half-measure): daemon sets AV_CODEC_FLAG_LOW_DELAY on
the H.264 AVCodecContext so libavcodec emits frames in decode order
~99% of the time (a few stragglers at GOP boundaries when the
stream's SPS num_reorder_frames overrides the flag).  Visible
improvement vs the 2-1-4-3 pair-swap on Firefox + mpv playback;
not the permanent fix — see daedalus-v4l2#11 for the architectural
plan to substitute daedalus-fourier kernels for libavcodec's
pixel math one cycle at a time.

#13 (daedalus-fourier linkage): daemon now pkg-config-links against
the daedalus-fourier kernel library (marfrit/daedalus-fourier) and
logs substrate availability at startup.  No kernels dispatched yet
— this is the build-time foundation for the substitution work.

build-deb.sh updated to fetch + build + install daedalus-fourier
(pinned at d87239d, marfrit/daedalus-fourier PR #1) into a per-
build temp prefix before invoking the daemon's cmake, exposing it
via PKG_CONFIG_PATH.  Static-linked, so the resulting .deb has no
new runtime deps.  Requires libvulkan-dev + glslang-tools on the
CI runner.

Arch PKGBUILD bumped to the same upstream commit but Arch packaging
for daedalus-fourier itself is a follow-up; until that lands the
Arch build expects daedalus-fourier installed by the user (AUR-style).
Debian-side is end-to-end self-contained via build-deb.sh.

Refs:
  * reauktion/daedalus-v4l2#12
  * reauktion/daedalus-v4l2#13
  * reauktion/daedalus-v4l2#11
  * marfrit/daedalus-fourier#1

arch/daedalus-v4l2/PKGBUILD

@@ -16,19 +16,21 @@
 pkgname=daedalus-v4l2
 _upstreampkg=daedalus-v4l2
 
-# Pin the daedalus-v4l2 tip.  5d8b436 = revert of PRs #7 + #8 (the
-# parking design that broke libva's 1:1 contract — see
-# daedalus-v4l2#9 + #10).  Tree is content-equivalent to f0d4186
-# plus PR #4 (DECODE_MODE / START_CODE menu controls; cosmetic
-# warning fix).  PROTO_VERSION drops 1 → 0 to match — lock-step
-# install with daedalus-v4l2-dkms 0.1.0.r33.5d8b436 REQUIRED.
-# Proper H.264 reorder fix tracked separately at daedalus-v4l2#11.
-_commit=5d8b4369e58ab947d1c56b1f718293c57c6065b5
+# 77e14e5 = post-revert state plus daedalus-v4l2 PRs #12 (LOW_DELAY
+# half-measure for the H.264 display-reorder visual) and #13 (daemon
+# now links daedalus-fourier and logs substrate availability at
+# startup).  Daemon now needs `daedalus-fourier` at build time —
+# Arch packaging for that sibling library is a follow-up; until it
+# lands as an AUR-style PKGBUILD, this Arch build expects
+# daedalus-fourier installed to /usr/local (or equivalent) by the
+# user.  See debian/daedalus-v4l2/build-deb.sh for the Debian-side
+# in-build fetch-and-install of daedalus-fourier.
+_commit=77e14e5a192f0eef0b41dd1140205e29d13d4d58
 
 # 0.1.0 (pre-1.0) + commit count + short sha.  Bump the .Y on each
 # Phase 8.x close.  pkgver() recomputes at build time.
-pkgver=0.1.0.r33.5d8b436
-pkgrel=1  # reset for new upstream pin (5d8b436 — revert parking design)
+pkgver=0.1.0.r37.77e14e5
+pkgrel=1  # reset for new upstream pin (77e14e5 — daedalus-fourier linkage)
 pkgdesc="Userspace daemon for the daedalus-v4l2 V4L2 stateless decoder shim (VP9/AV1/H.264 on Pi 5 / CM5)"
 arch=('aarch64')
 url="https://git.reauktion.de/reauktion/daedalus-v4l2"