Handle cumulative evidence

[alfinkel]

Overview

Provide a way to more easily handle and/or mark a fetcher/evidence as one that's accumulating evidence on a timely basis. This will ensure that proper logic is added to ensure evidence continuity from one run to the next.

Requirements

• The key thing is making it clear that a fetcher is collecting cumulative evidence - this is important at review time, for e.g. We could also provide some helpers, such as getting the last run date easily.
• TBD... Needs more research, thought, discussion

Approach

• TBD
• May be a fetcher subclass??
• May be an evidence subclass??
• May be both

Security and Privacy

N/A

Test Plan

TBD