Determine appropriate date format for sca_capacity_projects

[mgraber]

The input data has two date formats: "SEPTEMBER YYYY" or "YYYY"
Previous output converted these into a date datatype, with format YYYY-MM-DD. This suggests greater temporal resolution than exists in the input data. It also takes all "YYYY" dates and, by default, turns them into "YYYY-01-01." January first might not be an appropriate default for school years.

Potential solutions:

• Do not output dates as YYYY-MM-DD, but instead as YYYY
• If we keep the YYYY-MM-DD format, make the default date for YYYY records September 1 rather than January 1
• As a combination of the two above options, output dates as YYYY-MM, with MM as 09 in all records

All of these depend on what format the front-end expects.