Need more detailed validation of transcription files

[stsccfr]

To address the Quality pillar of our QSG strategy, we should develop a means of checking transcription files to identify records that seem wrong or suspicious and warrant review by the transcriber or coordinator.

Ideally, the checking should be done in the transcription software itself, which will be FreeComETT, because this gives the transcriber the earliest possible warning that something may be wrong. However, checking at this stage can only be done one record at a time and thus cannot identify problems that depend on context, or on multiple records. For example, a set of parents may baptise multiple children on the same day, and in the register the family surname is spelt consistently while the transcription is inconsistent. Or the groom/bride/witnesses for one marriage inadvertently sign the wrong form-- only context can identify these sorts of problems.

The FreeREG server already performs some basic validation of all uploaded transcription files, so we could add more checks to that code, at the expense of increasing the processing time.

Another possibility is to provide an Action button to transcribers and Volunteers to perform a thorough check of any selected file.