Move public tables to a triage-specific schema

Move all triage-created tables in the public schema (labels, cohorts, etc) to a separate schema that is created specifically for triage (schema name tbd?)

Start by inventorying the triage-created tables currently in the public schema, including labels and cohorts, and trace where they are created. Decide the triage-specific schema name before moving the tables, then verify that triage still creates and accesses them there and that the public schema no longer contains them.

Written by the indexing model from the issue text.