Enhancement: Broken reference detector should indicate file and line where offending resource was declared #100
Description
When the reference validation feature detects a broken reference, it currently prints messages such as the following:
Catalog has broken reference: cron::job[backup_to_s3] -> require[Aws::S3cfg[<fqdn>]] (OctocatalogDiff::Errors::ReferenceValidationError)
It would be much more helpful if this also printed the filename and line number where (in this example) cron::job { 'backup_to_s3': ...} was declared, to avoid searching through the codebase for it.