Please address the comments from this code review:

## Overall Comments
- The new `go:embed` approach in `pkg/version/internal/version_data.go` depends on the generated files existing; consider ensuring placeholder defaults are checked in or adding a guard/generator hook so commands like `go list ./...` or `go vet` in a clean tree don’t fail when `scripts/go-tool.sh` hasn’t been run.
- In `scripts/go-tool.sh`, the `git describe`/`git rev-parse` fallbacks assume a git repo and tags are always available; it may be worth adding explicit error handling or a clearer fallback for detached/untagged or non-git build environments.
- The change in `.github/actions/cache-go-dependencies/action.yaml` to always save the Go build cache is marked as temporary; consider gating this behind an input or reverting to conditional save before merging to avoid unnecessary cache uploads on all PRs.

## Individual Comments

### Comment 1
<location path="scripts/go-tool.sh" line_range="32-38" />
<code_context>
+# Determine the version string.
+# BUILD_TAG is set by CI (GHA via define-job-matrix, Konflux via Docker ARG).
+# Falls back to git describe for local development.
+if [[ -n "${BUILD_TAG:-}" ]]; then
+	main_version="${BUILD_TAG}"
+	git_short_sha="$(echo "$BUILD_TAG" | sed -n 's/.*g\([0-9a-f]\{1,\}\)$/\1/p')"
+else
+	main_version="$(cd "${REPO_ROOT}"; git describe --tags --abbrev=10 --long --exclude '*-nightly-*')"
</code_context>
<issue_to_address>
**suggestion:** Consider a fallback for git_short_sha when BUILD_TAG does not contain a git-style suffix

This assumes BUILD_TAG ends with `g<sha>`. If it doesn’t (e.g., different CI format or local override), `git_short_sha` will be empty even in non-test builds, which is a behavior change and reduces usefulness of GitShortSha. Consider detecting an empty result and falling back to `git rev-parse --short HEAD` to keep it populated when possible.

```suggestion
if [[ -n "${BUILD_TAG:-}" ]]; then
	main_version="${BUILD_TAG}"
	git_short_sha="$(echo "$BUILD_TAG" | sed -n 's/.*g\([0-9a-f]\{1,\}\)$/\1/p')"
	if [[ -z "${git_short_sha}" ]]; then
		git_short_sha="$(cd "${REPO_ROOT}"; git rev-parse --short HEAD)"
	fi
else
	main_version="$(cd "${REPO_ROOT}"; git describe --tags --abbrev=10 --long --exclude '*-nightly-*')"
	git_short_sha="$(cd "${REPO_ROOT}"; git rev-parse --short HEAD)"
fi
```
</issue_to_address>