Everything-is-an-app: non-blocking CI comment on vendor values.schema.json drift

[j-zimnowoda]

Parent

#3515

What to build

A non-blocking CI safety net that flags vendor-schema drift when a chart version is bumped, so maintainers can note likely-breaking changes without owning an ongoing migration mechanism.

End-to-end behavior:

• When a PR changes a chart version in charts/dependencies.yaml, CI diffs the old vs. new vendor values.schema.json (for charts that ship one) and posts a summary comment on the PR.
• The check is informational only — never a merge gate — and does not attempt to auto-migrate anything.
• Charts without a vendor schema are skipped.

Acceptance criteria

• On a PR that bumps a chart version with a vendor schema, CI posts a comment summarizing the values.schema.json diff.
• The check never blocks merge and produces no failure status.
• Charts without a vendor schema are ignored.

Blocked by

None - can start immediately.