Schema validation errors name only the subchart, not its full path, for nested dependencies #32893

What happened?

When a values schema check fails in a nested subchart, the error names only that subchart, not the charts above it:

Error: values don't meet the specifications of the schema(s) in the following chart(s):
leaf:
- at '': missing property 'owner'

This is a problem when a common library chart (for example, one that adds standard labels) is a dependency of many subcharts in an umbrella chart. Every failure reads leaf:, so you can't tell which subchart has the bad values. The --debug log doesn't help either, because it also uses the short name.

What did you expect to happen?

The error should name the full chart path, in the same top/charts/mid/charts/leaf form that Helm already prints for template errors:

top/charts/mid/charts/leaf:
- at '': missing property 'owner'

How can we reproduce it (as minimally and precisely as possible)?

mkdir -p top/charts/mid/charts/leaf
printf 'apiVersion: v2\nname: top\nversion: 0.1.0\n' > top/Chart.yaml
printf 'apiVersion: v2\nname: mid\nversion: 0.1.0\n' > top/charts/mid/Chart.yaml
printf 'leaf:\n  name: x\n' > top/charts/mid/values.yaml
printf 'apiVersion: v2\nname: leaf\nversion: 0.1.0\ntype: library\n' > top/charts/mid/charts/leaf/Chart.yaml
printf '{"type":"object","required":["owner"]}\n' > top/charts/mid/charts/leaf/values.schema.json
helm template top

The error names leaf: instead of top/charts/mid/charts/leaf:.

The cause is in ValidateAgainstSchema (pkg/chart/common/util/jsonschema.go). It writes chrt.Name() for each chart it validates. ChartFullPath() is already on the chart accessor and would give the full path. I have a fix with tests ready and will open a PR.

Helm version

v4.3.0+gbec5b06

The same code is on main.

Kubernetes version

Not relevant: helm template reproduces it without a cluster.