fix(x10express): restore RADIO_X10EXPRESS guards, de-dupe RADIO_FLAVOR, add ci check to prevent future occurances (#7725)

Co-authored-by: Peter Feerick <5500713+pfeerick@users.noreply.github.com>
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

.github/workflows/codegen_drift.yml

@@ -74,13 +74,14 @@ jobs:
           wget -qO- "https://github.com/casey/just/releases/download/${JUST_VERSION}/just-${JUST_VERSION}-x86_64-unknown-linux-musl.tar.gz" \
             | tar xz -C /usr/local/bin just
 
-      # A Justfile change cannot cause drift, but it can rename a recipe out
-      # from under the jobs below, so check they still resolve rather than
-      # regenerating everything.
-      - name: Check the recipes this workflow calls still resolve
+      # A Justfile change cannot cause drift, but it can break the file, and
+      # parsing validates every recipe rather than only the ones below. Fails
+      # here in seconds instead of in the container jobs; the list is derived,
+      # so adding a recipe needs no change.
+      - name: Validate the Justfile
         run: |
           just --list >/dev/null
-          for recipe in cfn-sort gen-fonts gen-yaml gen-radios gen-simstr; do
+          for recipe in $(just --summary); do
             just --show "${recipe}" >/dev/null
           done