Integrated GPU Inventory & Hybrid Visibility
- Added first-class integrated GPU inventory handling in unified hardware summaries.
- Hybrid systems now keep both dedicated and integrated GPU models visible.
- Integrated-only systems keep GPU visibility even when the runtime backend remains CPU.
- Recommendation, tiering, and token-speed estimation now use canonical integrated-GPU signals more consistently.
- CLI output now shows dedicated vs integrated GPU inventory explicitly.
- Added regression coverage for hybrid and integrated-only detection paths.