daedalus-v4l2{,-dkms}: 462aa4b -> f0d4186 — per-ctx vb2 lock

Upstream PR #3 — kernel per-context vb2_queue lock so concurrent
clients of /dev/video0 don't serialise on a device-wide mutex.
Pi 5 Firefox VAAPI playback (RDD + content + GPU processes each
opening the device) now works without S_FMT EBUSY collisions.

Verified on higgs: YouTube playback engages daedalus at sustained
~230 fps decode through the libavcodec dlopen path, ~7× headroom
over the 30fps@1080p Pi 5 Fourier target.

Both packages: pkgver 0.1.0.r24.f0d4186, pkgrel reset to 1.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

debian/daedalus-v4l2-dkms/build-deb.sh

@@ -14,8 +14,8 @@
 # Sibling userspace package: ../daedalus-v4l2/build-deb.sh
 set -euo pipefail
 
-UPSTREAM_COMMIT=462aa4b4804972189d2f1b1ab5782f1ca1e8c423
-PKGVER=0.1.0+r22+g462aa4b
+UPSTREAM_COMMIT=f0d41867f60f5bf8dbfcc6cc16404d7d7eb90014
+PKGVER=0.1.0+r24+gf0d4186
 PKGREL=1  # reset for new upstream pin (3dd0eb0 — DAEMON-PPS H.264 SPS/PPS NAL synth)
 MODULE_NAME=daedalus_v4l2