renaming following global Salut à Toi => Libervia renaming: /!\ application name and environment variables are renamed /!\ - Twisted application name is now `libervia-pubsub` - environment variable are now prefixed by `LIBERVIA_PUBSUB_`

create table callbacks (
    service text not null,
    node text not null,
    uri text not null,
    PRIMARY KEY (service, node, uri)
);