Add missing DEFAULT_HARDWARE and AVAILABLE_HARDWARE settings

app/config.py

@@ -52,6 +52,8 @@ class Settings(BaseSettings):
     # Hardware
     DEVICE: str = "auto"  # auto, cpu, cuda, mps
     DTYPE: str = "auto"   # auto, float32, float16, bfloat16
+    DEFAULT_HARDWARE: str = "auto"
+    AVAILABLE_HARDWARE: List[str] = ["cpu", "cuda", "auto"]
     
     # PEFT / LoRA Defaults
     PEFT_DEFAULTS: dict = {