Add column to time series associations database for the component field name being modeled

[daniel-thom]

Currently, every time series has a name field, which is just a user-defined name. We want the component - time series association to include the component field being modeled. It won't be used yet. This issue is to track adding the database column so that the Python and Julia sides are compatible.

[jd-lara]

We discussed making the column a tuple to reflect composition requirements.