Review check_quarter_format function

[Jennit07]

This caused us issues when trying to run the individual file in the december update. Making a note to go back and review this - i have commented out the function for running purposes. See the script get_fy_quarter_dates.R

https://github.com/Public-Health-Scotland/source-linkage-files/blob/dec-update-23/R/get_fy_quarter_dates.R

[Jennit07]

requires investigation - decide if we actually need this as in our update we just excluded this for running. This mainly affected the individual file

[Jennit07]

The function check_quarter_format is not needed anymore as we have period_start_date and period_end_date which is being read in from the SC platform. These can be used in place of calculations for the start and end of the quarter.

I have found that most quarter calculation functions are not needed. I have removed this and used period_start_date or period_end_date in place for the CH processing script which looked like it was the only script using these. I have made a few changes but also need to look more into this. The function calculate_stay is using some quarter dates for calculation in care home data but this could be amended to use period_end_date. I need to look at the impact of removing the quarter functions all together as it is a little bit confusing with social care code in the mix and how we deal with missing end dates.

There is one line being used in create_individual_file which is impacted by this but when i was looking at the code, at this stage in processing period_start_date or period_end_date are not available as they are dropped in the process. We could use sc_latest_submission but that would be period, e.g. the format 2018Q2 which is not always reliable as we know some areas only submit annual data. Needs more investigation, especially to get the logic consistent with social care code.