-- Track per-job imported source IDs and drive paths outside cursor_json.
CREATE TABLE migration_imported_items (
    id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
    job_id UUID NOT NULL REFERENCES migration_jobs(id) ON DELETE CASCADE,
    source_id TEXT NOT NULL,
    rel_path TEXT NOT NULL DEFAULT '',
    imported_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    UNIQUE(job_id, source_id)
);

CREATE INDEX idx_migration_imported_items_job ON migration_imported_items(job_id);
