-- Migration: 060_job_queue.sql
-- Description: Create jobs table for persistent worker queue

CREATE TABLE IF NOT EXISTS jobs (
    id UUID PRIMARY KEY,
    type VARCHAR(50) NOT NULL,
    payload JSONB NOT NULL DEFAULT '{}',
    status VARCHAR(20) NOT NULL DEFAULT 'pending', -- pending, processing, completed, failed
    priority INT NOT NULL DEFAULT 2, -- 1=high, 2=medium, 3=low
    run_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
    created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
    updated_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
    started_at TIMESTAMP WITH TIME ZONE,
    completed_at TIMESTAMP WITH TIME ZONE,
    failed_at TIMESTAMP WITH TIME ZONE,
    retries INT NOT NULL DEFAULT 0,
    max_retries INT NOT NULL DEFAULT 3,
    last_error TEXT
);

-- Index for efficient polling
CREATE INDEX IF NOT EXISTS idx_jobs_status_run_at ON jobs (status, run_at);
CREATE INDEX IF NOT EXISTS idx_jobs_type ON jobs (type);