Constant SCHEMA 

pub(crate) const SCHEMA: &str = "
    CREATE TABLE IF NOT EXISTS db_work_claims (
        id            TEXT PRIMARY KEY,
        agent         TEXT NOT NULL,
        agent_uid     TEXT NOT NULL DEFAULT '',
        channel       TEXT NOT NULL DEFAULT '',
        repo          TEXT,
        path          TEXT,
        absolute_path TEXT,
        branch        TEXT,
        topic         TEXT,
        note          TEXT NOT NULL DEFAULT '',
        created_at    INTEGER NOT NULL,
        expires_at    INTEGER NOT NULL
    );
    CREATE INDEX IF NOT EXISTS idx_ids_work_claims_expires ON db_work_claims(expires_at);";

The table, created on every open of the identity store (Store::open_identity_store). A new table with no ALTER, so the store’s schema version is deliberately not bumped: this runs on every open anyway, and a bump would make every older installed build refuse the shared store.