Shorten Subject primary key length

[CBroz1]

In a meeting about another project, @dimitri-yatsenko commented that varchar(32) was longer than it should be for a primary key across the whole framework. Some documentation suggests limiting this value to 8 characters, if possible. Should the element reflect that?

subject: varchar(8)

Is there a process for determining backwards compatibility for existing use cases?

[dimitri-yatsenko]

yes please. Some fields propagate down to every element, including cells, model fits, etc. These should be short ids.

[kabilar]

Thanks @CBroz1. I agree with this decision. We do not currently have a process for determining backwards compatibility but this would be a good opportunity for creating such a process. We can document the process in Issue #22.