CREATE TABLE IF NOT EXISTS task_runs (
    id              TEXT PRIMARY KEY,
    task_id         TEXT NOT NULL,
    status          TEXT CHECK(status IN ('pending','running','failed','success'))  NOT NULL DEFAULT 'pending',
    trigger_mode    TEXT CHECK(status IN ('manual','webhook','schedule'))  NOT NULL,
    exit_code       INT,
    logs            TEXT,
    submitted_at    DATETIME,
    started_at      DATETIME,
    end_at          DATETIME
)