CREATE TABLE IF NOT EXISTS wiki_ingest_checkpoints (
    tenant_id INTEGER NOT NULL,
    knowledge_base_id TEXT NOT NULL,
    knowledge_id TEXT NOT NULL,
    fingerprint TEXT NOT NULL,
    stage TEXT NOT NULL,
    item_key TEXT NOT NULL,
    payload TEXT NOT NULL,
    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
    PRIMARY KEY (tenant_id, knowledge_base_id, knowledge_id, fingerprint, stage, item_key)
);