Check and fix study date range

[vvcb]

This is linked to https://github.com/MattStammers/hdruk_avoidable_admissions_collaboration_docs/issues/3 and email conversations around the correct study date range. Once agreed and if different from what is in place at the moment, the following code will need to be modified.

• https://github.com/LTHTR-DST/hdruk_avoidable_admissions/blob/dev/avoidable_admissions/data/validate.py#L56
• https://github.com/LTHTR-DST/hdruk_avoidable_admissions/blob/dev/avoidable_admissions/data/validate.py#L173

[MattStammers]

I think this is now correct

[MattStammers]

no this is not correct but I can't merge it with the ticket above (they need to be joined and this one closed

[vvcb]

Duplicate of #16