Split raspberry pi build into a separate workflow

.gitea/workflows/build.yml

@@ -1,20 +1,18 @@
-# One build workflow for every branch — do not add per-branch copies.
+# One build workflow per hardware family, identical on every branch — do not
+# add per-branch copies. build-rpi.yaml is the same file with a different matrix.
 #
 # The branch/ref selects the channel, nothing else does: the flake's `channel`
 # block picks the app input, Attic repo, and upgrade ref, so the same config
-# names build dev images on `dev` and prod images on `main`. This file itself
-# is identical on both branches.
+# names build dev images on `dev` and prod images on `main`.
 #
 # Trigger model:
 #   * push to `dev`   -> build every development image
 #   * new git tag     -> build every production image (tags live on main)
 #   * manual dispatch -> build the channel of the selected branch
 #
-# Hardware variants come from an include-matrix:
+# This file builds the x86_64 ISO variants:
 #   ISO variants  -> .config.system.build.isoImage (storeContents pulls in the closure)
-#   Raspberry Pi  -> .config.system.build.sdImage
-# `orion-lxc` emulates aarch64-linux, so the Pi build runs alongside the rest.
-name: Build Kiosk Images
+name: Build Kiosk Images (x86)
 
 on:
   workflow_dispatch:
@@ -41,14 +39,7 @@ jobs:
         include:
           # NOTE: Gitea schedules matrix jobs in reverse definition order on
           # the single orion-lxc runner, so the list is reversed on purpose:
-          # rpi -> android -> commercial -> kiosk means kiosk builds FIRST.
-          - label: rpi
-            system: radiantwavekiosk-rpi
-            target: sdImage
-            outdir: sd-image
-            ext: img.zst
-            arch: aarch64-linux
-            manifest: aarch64-manifest.json
+          # android -> commercial -> kiosk means kiosk builds FIRST.
           - label: android
             system: android-iso
             target: isoImage
@@ -150,4 +141,4 @@ jobs:
             "/var/lib/gitea-runner/radiantwave/${FILENAME}"
           scp "/var/lib/gitea-runner/radiantwave/${FILENAME}" \
             157.245.124.103:/mnt/infrastructure_data/files/images/
-          rm -f "/var/lib/gitea-runner/radiantwave/${FILENAME}"
+          rm -f "/var/lib/gitea-runner/radiantwave/${FILENAME}"