Constant MIGRATION_V13

pub const MIGRATION_V13: &str = r#"
DROP TABLE IF EXISTS session_events;
CREATE TABLE session_events (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    rovenue_id TEXT NOT NULL,
    kind TEXT NOT NULL,
    occurred_at TEXT NOT NULL,
    duration_ms INTEGER
);
CREATE INDEX idx_session_events_id ON session_events(id);

DROP TABLE IF EXISTS attribute_mutations;
CREATE TABLE attribute_mutations (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    rovenue_id TEXT NOT NULL,
    key TEXT NOT NULL,
    value TEXT
);
CREATE INDEX idx_attribute_mutations_id ON attribute_mutations(id);

UPDATE schema_meta SET version = 13;
"#;

Session events and attribute mutations carry the wire identity they were recorded under, so each drains under its own subscriber and log_out has nothing to discard (it used to clear both, losing whatever the 30 s flush had not sent yet). Recreated rather than altered: rows buffered before this carry no identity to post them under.