Cuukit Lonca 7.4.0

Load control (experimental, off by default). Turn it on in Settings → Orchestrator. Lonca then decides from the machine's CPU and memory how many tasks and tests run at once. It freezes or pauses low-priority work while the machine is busy and gives high-priority tasks the machine first. Nothing stays frozen longer than 10 minutes or paused longer than 20. New config key: orchestrator.test_concurrency (default 4).