ci/woodpecker/push/build-ci-images Pipeline was successful
Addresses #209. All four ci/images/*/Containerfile FROM lines were tag-pinned only (alpine:3.21, node:22-alpine), letting the base silently change between builds. Pin each to its current manifest-list digest. ci/images/k8s/Containerfile downloaded talosctl, kubectl, and velero via curl with no integrity check, and installed flux via `curl | bash` (itself an unpinned, unverified fetch-and-execute). Replace the flux install with a pinned-version tarball download verified against its published sha256 checksum, same as talosctl/kubectl/velero now are. kubectl's version was also resolved dynamically from dl.k8s.io's stable.txt at build time instead of being pinned; add KUBECTL_VERSION. ci/images/tofu/Containerfile's tofu.zip download gets the same sha256 verification. ci/images/claude/Containerfile's CLAUDE_CODE_VERSION defaulted to `latest` and was never overridden by build-ci-images.yml, so the image holding repo/issue-write tokens floated to whatever npm resolved at build time. Pin it to the current release (2.1.209). Checksums and digests verified against the respective registries/release APIs at fix time (2026-07-14). Co-Authored-By: Claude Bot <claude-bot@renner.uno>