-- hosts: physical or virtual machines belonging to a network.
-- The ip field must fall within the CIDR of the parent network
-- (enforced in application code, not at the DB level).
CREATE TABLE IF NOT EXISTS hosts (
    id         INTEGER PRIMARY KEY AUTOINCREMENT,
    name       TEXT    NOT NULL,
    ip         TEXT    NOT NULL,
    network_id INTEGER NOT NULL REFERENCES networks(id) ON DELETE CASCADE
);