CREATE TABLE events (
    id INTEGER PRIMARY KEY,
    event_id TEXT NOT NULL UNIQUE,
    chat_id TEXT NOT NULL,
    kind TEXT NOT NULL,
    status TEXT NOT NULL DEFAULT 'planned',
    props_json TEXT NOT NULL DEFAULT '{}',
    planned_for TEXT,
    started_at TEXT,
    completed_at TEXT,
    created_at TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at TEXT NOT NULL DEFAULT (datetime('now'))
);
CREATE INDEX events_chat_idx ON events(chat_id, status);