-- 定时任务表（Phase 6）
CREATE TABLE IF NOT EXISTS scheduled_tasks (
    id UUID PRIMARY KEY,
    name TEXT NOT NULL UNIQUE,
    description TEXT NOT NULL DEFAULT '',
    user_id TEXT NOT NULL,
    command TEXT NOT NULL,
    shell TEXT NOT NULL DEFAULT '/bin/bash',
    cwd TEXT NOT NULL DEFAULT '',
    interval_seconds INTEGER NOT NULL,
    enabled BOOLEAN NOT NULL DEFAULT true,
    next_run_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    last_run_at TIMESTAMPTZ,
    last_status TEXT,
    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
);

CREATE INDEX IF NOT EXISTS idx_scheduled_tasks_due
    ON scheduled_tasks (enabled, next_run_at);