Upgrade components versions

[neodesys]

Upgrade versions:

• Ubuntu 26.04 LTS
• GStreamer 1.28.3
• CEF 147.0.14+g76d2442+chromium-147.0.7727.138

and remove references to WebKit or SCCache not used anymore.

[claude]

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[Copilot]

Pull request overview

Upgrades the base build/runtime stack to Ubuntu 26.04 LTS, GStreamer 1.28.3, and CEF 147, while removing no-longer-used WebKit/SCCache-related build wiring and pruning obsolete downstream patches.

Changes:

• Bump base images to Ubuntu 26.04 and update dependency package names accordingly.
• Update GStreamer/CEF versions and refactor CEF source configuration into docker/cef-config.sh.
• Reorganize/prune patch sets and remove SCCache-related configuration and docs.

Reviewed changes

Copilot reviewed 24 out of 26 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
sccache.toml	Removes SCCache distribution config template (no longer used).
README.md	Updates base OS/component list and removes SCCache/WebKit documentation.
Dockerfile-prod-base.in	Switches runtime base to Ubuntu 26.04 and updates runtime dependencies.
Dockerfile-latest-prod.in	Removes unused WEBKIT_USE_SCCACHE build arg.
Dockerfile-latest-prod-dbg.in	Removes unused WEBKIT_USE_SCCACHE build arg.
Dockerfile-latest-dev-with-source.in	Removes unused WEBKIT_USE_SCCACHE build arg.
Dockerfile-dev-downloaded.in	Bumps default GStreamer version; removes SCCache template copy; uses CEF config script.
Dockerfile-dev-dependencies	Switches dev-deps base to Ubuntu 26.04 and uses renamed install script.
docker/install-arch-specific-dependencies.sh	Updates Intel MFX dependency package for amd64.
docker/cef-config.sh	Centralizes CEF repository/checkout/version configuration.
docker/build-gstreamer/install-dev-dependencies	Updates build dependencies for Ubuntu 26.04 and toolchain setup.
docker/build-gstreamer/download	Sources CEF config and uses it to clone/checkout gstcefsrc.
docker/build-gstreamer/compile	Updates Meson invocation, patch application paths, and applies reduced patch set.
docker/build-gstreamer/patch/gstreamer/0001-compositor-add-rounded-corners-property-for-sink-pad.patch	Refreshes compositor rounded-corners patch for newer GStreamer.
docker/build-gstreamer/patch/gstreamer/0002-compositor-add-box-shadow-property-for-sink-pads.patch	Refreshes compositor box-shadow patch for newer GStreamer.
docker/build-gstreamer/patch/gstreamer/0003-Reduce-logs-verbosity-in-webrtcbin-when-a-FEC-decode.patch	Refreshes webrtcbin log-verbosity patch offsets for newer GStreamer.
docker/build-gstreamer/patch/cefsrc/0001-cefsrc-download-minimal-package.patch	Adds patch to download CEF minimal package variant.
docker/build-gstreamer/patch/cefsrc/0002-cefsrc-unmultiply-alpha.patch	Adds patch to unpremultiply alpha in CEF source output.
docker/build-gstreamer/patch/0001-pad-Check-data-NULL-ness-when-probes-are-stopped-fixed-in-1.24.8.patch	Removes patch (fixed upstream in newer versions).
docker/build-gstreamer/patch/0001-libnice.wrap-fix-incomplete-TCP-ICE-candidate-crash.patch	Removes patch (presumably fixed/obsolete with upgrade).
docker/build-gstreamer/patch/0001-gsth264parser-fix-uint32-to-int32-truncation.patch	Removes patch and its associated test changes (presumably fixed/obsolete with upgrade).
docker/build-gstreamer/patch/0001-GstAudioAggregator-fix-structure-unref.patch	Removes patch (presumably fixed/obsolete with upgrade).
docker/build-gstreamer/patch/0001-glvideomixer-update-API-to-be-compatible-with-versio.patch	Removes patch (presumably fixed/obsolete with upgrade).
docker/build-gstreamer/patch/0001-baseparse-always-update-the-input-pts-if-available-from.patch	Removes patch (presumably fixed/obsolete with upgrade).
build-release.sh	Updates base image pull to 26.04 and removes SCCache templating logic.
build-latest.sh	Updates base image pull to 26.04 and removes SCCache templating logic.

Comments suppressed due to low confidence (1)

docker/build-gstreamer/install-dev-dependencies:133

• pip3 install --upgrade --break-system-packages meson ninja will leave pip’s wheel/download cache in the image, increasing the dev-dependencies layer size. Consider using --no-cache-dir and/or purging ~/.cache/pip after the install (similar to how apt lists are cleaned).

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