feat: 🎉 postgresql broker first commit of forked prototype from my original code

pkg/broker/install/sql/tables/03_broker_schedule.sql

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+-- broker_schedule table
+-- Stores scheduled jobs (cron-like functionality)
+
+CREATE TABLE IF NOT EXISTS broker_schedule (
+    id_broker_schedule BIGSERIAL PRIMARY KEY,
+    name VARCHAR(255) NOT NULL UNIQUE,
+    cron_expr VARCHAR(100) NOT NULL,
+    enabled BOOLEAN NOT NULL DEFAULT true,
+    job_name VARCHAR(255) NOT NULL,
+    job_priority INTEGER NOT NULL DEFAULT 0,
+    job_queue INTEGER NOT NULL DEFAULT 1,
+    job_language VARCHAR(50) NOT NULL DEFAULT 'sql',
+    execute_str TEXT NOT NULL,
+    run_as VARCHAR(100),
+    created_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT NOW(),
+    last_run_at TIMESTAMP WITH TIME ZONE,
+    next_run_at TIMESTAMP WITH TIME ZONE,
+
+    CONSTRAINT broker_schedule_job_queue_check CHECK (job_queue > 0)
+);
+
+-- Indexes
+CREATE INDEX IF NOT EXISTS idx_broker_schedule_enabled ON broker_schedule(enabled);
+CREATE INDEX IF NOT EXISTS idx_broker_schedule_next_run ON broker_schedule(next_run_at) WHERE enabled = true;
+CREATE INDEX IF NOT EXISTS idx_broker_schedule_name ON broker_schedule(name);
+
+-- Comments
+COMMENT ON TABLE broker_schedule IS 'Scheduled jobs (cron-like functionality)';
+COMMENT ON COLUMN broker_schedule.name IS 'Unique name for the schedule';
+COMMENT ON COLUMN broker_schedule.cron_expr IS 'Cron expression for scheduling';
+COMMENT ON COLUMN broker_schedule.enabled IS 'Whether the schedule is active';
+COMMENT ON COLUMN broker_schedule.job_name IS 'Name of the job to create';
+COMMENT ON COLUMN broker_schedule.execute_str IS 'SQL or code to execute';
+COMMENT ON COLUMN broker_schedule.last_run_at IS 'Last time the job was executed';
+COMMENT ON COLUMN broker_schedule.next_run_at IS 'Next scheduled execution time';
+
+-- Trigger to update updated_at
+CREATE OR REPLACE FUNCTION tf_broker_schedule_update_timestamp()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER t_broker_schedule_updated_at
+    BEFORE UPDATE ON broker_schedule
+    FOR EACH ROW
+    EXECUTE FUNCTION tf_broker_schedule_update_timestamp();