local/build-all.R had a 75-name hardcoded vector that drifted from
local/excluded-packages.json (RcmdrPlugin.ROC was in the R vector
but missing from the JSON). weekly-rebuild-missing-* already reads
the JSON, so this aligns build-all.R with that pattern.
- Add the missing RcmdrPlugin.ROC entry to excluded-packages.json
- Replace the hardcoded vector in build-all.R with
jsonlite::fromJSON("local/excluded-packages.json")[["package"]]
- Pull jsonlite into the install-deps step so it's available in
/mnt/cache/R-pkgs for the build step
- Drop the dead base64 SKIP_PKGS docs comment from
build-all-versions-arm64.yaml; point to the JSON instead
