refactor(ci): skip bincraft reinstall when image already has it

bincraft is baked into the build-env images, but every workflow run
unconditionally called pak::pak("git::.../bincraft.git") to defend
against bakes where the install silently failed.
That cost ~30-60s per job (pak resolves Remotes, may recompile),
which adds up across all process-updates, update-package-index,
weekly-rebuild and archive-missed-packages workflows.

Guard the call with requireNamespace(): healthy images skip the
install entirely; broken images still self-heal.

.crow/process-updates-redhat-9-amd64.yaml

@@ -53,7 +53,7 @@ steps:
     commands:
       - git clone -q https://pat-s:$$REPO_RO_TOKEN@git.devxy.io/devxy/build-cran-binaries.git .
       - rm -rf /mnt/cache/R-pkgs/00LOCK-r-pkg-binaries /mnt/cache/R-pkgs/00LOCK-bincraft /mnt/cache/R-pkgs/00LOCK-pak /mnt/cache/pkgcache/R/pkgcache /mnt/cache/pkgcache/R/pkgcache /mnt/cache/R-pkgs/pkgcache /mnt/cache/R-pkgs/00LOCK-pak/mnt/cache/R-pkgs/00LOCK-RPostgres /mnt/cache/R-pkgs/bincraft
-      - /opt/R/$R_VERSION/bin/R -q -e 'pak::pak("git::https://codefloe.com/rpkgs/bincraft.git")'
+      - /opt/R/$R_VERSION/bin/R -q -e 'if (!requireNamespace("bincraft", quietly = TRUE)) pak::pak("git::https://codefloe.com/rpkgs/bincraft.git")'
       - /opt/R/$R_VERSION/bin/R -q -e 'packageVersion("bincraft")'
       - mkdir -p /mnt/cache/pkgcache /mnt/cache/R-pkgs /mnt/cache/ccache /mnt/cache/packages
       # options(future.globals.onReference = NULL): for some reason s3fs::file_delete() throws 'Error: Detected a non-exportable reference ('externalptr') in one of the globals ('FUN' of class 'function') used in the future expression' otherwise