Add an informational message about schema validation failures

hack/verify-crd-schema-checker.sh

@@ -5,4 +5,10 @@ source "$(dirname "${BASH_SOURCE}")/lib/init.sh"
 # Use PULL_BASE_REF for CI, otherwise use master unless overriden.
 COMPARISON_BASE=${COMPARISON_BASE:-${PULL_BASE_SHA:-"master"}}
 
+# Use a trap so this gets printed at the end of the log even when we exit early due to an error/failure
+trap 'echo This verifier checks all files that have changed. In some cases you may have changed or renamed a file that \
+already contained api violations, but you are not introducing a new violation.  In such cases it is appropriate to /override the \
+failing CI job.' EXIT
+
 GENERATOR=schemacheck EXTRA_ARGS=--schemacheck:comparison-base=${COMPARISON_BASE} ${SCRIPT_ROOT}/hack/update-codegen.sh
+