User KV
Persistent per-user JSON state for one plugin.
User KV is the persistent counterpart to Session KV.
These routes are available only on servers built with the postgres feature. On
stateless or non-Postgres deployments, this surface is not present.
Use it when:
- data should follow one user across sessions
- a plugin needs preferences, tokens, or saved state
- JSON values are enough and a database-backed store is available