Update discourse to latest(ish) ESR version from previous, soon-to-be unsupported, ESR version.
Upstream changes: https://releases.discourse.org/changelog/custom?end=v2026.7.0&start=v2026.1.4
Changes:
- simple version / dep updates of all plugins and discourse itself
- updated the update script to correctly handle changes to discourses's architecture, and fixed a bug
- the NamedTemporaryFiles were not flush()ed, which meant their content was not written
- discourse now has dependencies under `migrations/` which are specified by path. this requires downloading the `migrations/` directory during the update so `bundle lock` / `bundix` run successfully. the logic for performing this was borrowed from the gitlab package.
- the hashes for the newly added dart-sass download are automatically updated
- updated some patches to match changes in the targeted code (notification_email, prebuild-asset-processor)
- delete a no longer relevant patch (unicorn_logging_and_timeout) (discourse no longer uses unicorn internally, although the external interface is similar / pretends to still exist)
- added two new patches, safe-exec-from-nix-store and sass_embedded_vendored_dart_sass
- safe-exec-from-nix-store: add /nix/store to the list of executable paths for the container used to sandbox imagemagick, which by default only contains the standard FHS paths
- sass_embedded_vendored_dart_sass: patch sass-embedded to use a version of dart-sass provided by the package instead of downloading it's own which would fail. this patch also involves code in default.nix which sets DART_SASS_VENDORED to the path of a downloaded dart-sass version
- updated the comment on prebuild-asset-processor.patch to more accurately reflect what and why it exists
Discourse normally overrides the default notification email setting,
which makes the `notificationEmailAddress` setting ineffective. Add a
patch to remove this override.
Fixes#140114.
