-- Models added while the cluster is running.
--
-- The catalog came from a YAML file read once at startup, so adding a model
-- meant editing a file on the control plane and restarting it: a settling
-- window, adoption churn, and on one occasion two minutes of outage. That is a
-- reasonable way to manage a fixed production set and a bad one for a platform
-- whose promise is that people can try things.
--
-- These live alongside the ones in configuration rather than replacing them.
-- Config-as-code stays declarative — a model in YAML is in the catalog on every
-- start, whatever the database says — and this table holds the ones added
-- afterwards. A model added here may not take a name or alias that
-- configuration already uses, which the catalog's own constructor enforces for
-- free, because it refuses a duplicate whatever the source.
--
-- The definition is stored as JSON rather than as columns. A profile is a
-- nested, evolving shape, and every field added to it would otherwise be a
-- migration; the catalog already knows how to validate one, and a row that
-- fails validation is reported and skipped rather than blocking startup.
CREATE TABLE models (
    name       TEXT PRIMARY KEY,
    definition TEXT NOT NULL,
    created_at TIMESTAMP NOT NULL,
    created_by TEXT NOT NULL DEFAULT ''
);