Fragment header fields to indicate issues during DAQ
A problem was discovered where Fragment data transmission could fail after the header was already transmitted. The current mitigation for this issue changes the type field of these fragments to indicate that they are no longer readable. It may be desirable to introduce another header field for this indication, allowing the original type information to be preserved.
A candidate implementation of a new RawFragmentHeader is on artdaq-core/feature/FragmentValidHeaderField.