adding custom BrightLite tables to root metrics list

[opotowsky]

No description provided.

[gidden]

I'm curious what our policy is for directly supporting 3rd party archetypes in our tooling ecosystem. Most of our tools to date allow for discovery, rather than explicit support.

This PR (to the best of my understanding) would be the first such explicit support, and thus would set a precedent. Accordingly, I think we should think about/declare what criteria exist for explicitly supporting 3rd party archetypes.

[opotowsky]

This is something I would like to fix in the future (post-semester), but since this still unstable code maybe we can let it slide for now?

Two options moving forward:

1. generalize: make an issue to add the capability in cymetric to look up "root metrics" in each database
2. consider this a user task, since we want users to write their own metrics anyway. (this would mean we shouldn't merge in the Bright-Lite stuff though)

[scopatz]

Thanks @opotowsky!