python: Add provenance column to MaD

[yoff]

trafficstars

In preparation for a future where models are generated from the ModelEditor and via AI (as well as the bespoke internal tools we are already building..).

I would like to know if all the rows in python/ql/lib/semmle/python/frameworks/data/internal/subclass-capture/ALL.model.yml should be labeled as manual.

TODO: Add preference for manual models.