There was no test file for k8s-client.ts. Existing pvc.test.ts mocked
`getPvc` directly and never exercised the underlying isNotFound predicate,
so the v1.x ApiException `code` vs `statusCode` regression had nothing to
catch it.
Add k8s-client.test.ts that mocks @kubernetes/client-node, throws errors
shaped exactly like the real ApiException (status under `code`), and
verifies:
- getPvc returns null on code=404 (the FAR-85 case)
- getPvc still handles legacy statusCode=404 and response.statusCode=404
- getPvc re-throws non-404 errors (500, 403)
- deletePvc swallows 404, re-throws others
- createPvc forwards spec to the SDK
Confirmed the new tests fail when k8s-client.ts is reverted to the
pre-fix predicate (2 failures), and pass with the fix in place.
Co-Authored-By: Paperclip <noreply@paperclip.ing>