The working copy: the draft, else what sends.
Which admin list section it sits in.
smst_…; null until the first write creates the row.
The validator's verdict on what sends; null when valid.
What sends: the live version's body, else the registry default.
DISABLED skips the send. A key with no row is ACTIVE.
One SMS template as both the senders and the editor read it: the registry entry merged with its row, if an operator has touched it. All fields are JSON-safe.