Adding a service_at_location_id to the service_area table

[dan-odsc]

Hi all, I have another use case, contributed by Karen Henry at the 211 for Finger Lakes Region, New York:

When pulling the details for a program, the service area should be related to the location, not the program. Such as Food Pantry at High Street Food Pantry is only available for Chemung County residents, and the Food Pantry at Schuyler Outreach Food Pantry is only available for Schuyler County residents. They are both food pantries offered by Catholic Charities of Chemung and Schuyler Counties. Currently, the service area shows Chemung and Schuyler counties for both locations. It is the same program in our database, but different locations with different eligibility.

I think we have definitely found a case for adding adding a service_at_location_id to the service_area table. I would like to propose this for the next minor version of HSDS.

@mrshll @Dan-ODS @bloom