fix(ci): pin Node.js 22.23.4 in the Ubicloud free-suite bootstrap too, and verify both archives by SHA-256

#3355 bumped Dockerfile.ci only; scripts/ubicloud/setup-free-suite.sh still
installed 22.20.0. Both now pin the same version and the linux-x64 SHA-256
from the release's signed SHASUMS256.txt, check the archive before unpacking,
and test/ci-image-cli-pin.test.ts keeps the two pins equal (#3354).

Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

Co-authored-by: Michael Sumner <75835774+michael-sumner@users.noreply.github.com>
Co-authored-by: capy-ai[bot] <230910855+capy-ai[bot]@users.noreply.github.com>

.github/docker/Dockerfile.ci

@@ -90,8 +90,13 @@ RUN curl --retry 5 --retry-delay 5 --retry-connrefused -fsSL https://cli.github.
 # and "gnupg" was renamed to "gpg" on Ubuntu 24.04 anyway, so NodeSource's script
 # fails before it can add its own repo. Direct tarball download is network-simpler
 # (one host: nodejs.org) and doesn't touch apt at all.
+# The hash comes from the release's signed SHASUMS256.txt, and the archive is
+# checked before it is unpacked. scripts/ubicloud/setup-free-suite.sh pins the
+# same version and hash (test/ci-image-cli-pin.test.ts keeps them equal).
 ENV NODE_VERSION=22.23.4
+ARG NODE_SHA256=1805bcd35e6815559bd2eb97db438d3fdb0eb3a5e6a977b7c1badca76337e9ce
 RUN curl --retry 5 --retry-delay 5 --retry-connrefused -fsSL "https://nodejs.org/dist/v${NODE_VERSION}/node-v${NODE_VERSION}-linux-x64.tar.xz" -o /tmp/node.tar.xz \
+    && echo "${NODE_SHA256}  /tmp/node.tar.xz" | sha256sum -c - \
     && tar -xJ -C /usr/local --strip-components=1 --no-same-owner -f /tmp/node.tar.xz \
     && rm -f /tmp/node.tar.xz \
     && node --version \