Final Data Pre-Submission Validator

[MattStammers]

We need to add a final data pre-submission validator to the pipeline to fully streamline it and check that all data being submitted is in keeping with the final version of the data spec.

Without this, the validator falls down at the final hurdle.

[vvcb]

@MattStammers , are you able to provide some more details? Would this be on the aggregate tables?