CREATE TABLE IF NOT EXISTS wiki_ingest_checkpoints (
    tenant_id BIGINT NOT NULL,
    knowledge_base_id VARCHAR(36) NOT NULL,
    knowledge_id VARCHAR(36) NOT NULL,
    fingerprint VARCHAR(64) NOT NULL,
    stage VARCHAR(32) NOT NULL,
    item_key VARCHAR(64) NOT NULL,
    payload TEXT NOT NULL,
    updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (tenant_id, knowledge_base_id, knowledge_id, fingerprint, stage, item_key)
);