Constant LAUNCHER_SAGA_SCHEMA_VERSION 

pub(super) const LAUNCHER_SAGA_SCHEMA_VERSION: i64 = 1;

user_version value stamped into launcher-sagas.db. Mirrors srv’s stamp_and_check_version tripwire (AUDIT_SQLITE_SYSTEMS §8.5). The launcher is a separate crate from srv, so the helper is duplicated here rather than shared.