feat: add node startup flow

packages/node/meshnet_node/hardware.py

@@ -0,0 +1,33 @@
+"""GPU hardware detection with graceful CPU fallback."""
+
+import subprocess
+
+
+def detect_hardware() -> dict:
+    """Detect GPU model and available VRAM. Returns hardware profile dict."""
+    try:
+        import torch  # type: ignore[import]
+        if torch.cuda.is_available():
+            idx = torch.cuda.current_device()
+            name = torch.cuda.get_device_name(idx)
+            props = torch.cuda.get_device_properties(idx)
+            vram_mb = props.total_memory // (1024 * 1024)
+            return {"device": "cuda", "gpu_name": name, "vram_mb": vram_mb}
+    except ImportError:
+        pass
+
+    try:
+        result = subprocess.run(
+            ["nvidia-smi", "--query-gpu=name,memory.total", "--format=csv,noheader,nounits"],
+            capture_output=True, text=True, timeout=5,
+        )
+        if result.returncode == 0 and result.stdout.strip():
+            line = result.stdout.strip().splitlines()[0]
+            parts = line.split(",", 1)
+            gpu_name = parts[0].strip()
+            vram_mb = int(parts[1].strip()) if len(parts) > 1 else 0
+            return {"device": "cuda", "gpu_name": gpu_name, "vram_mb": vram_mb}
+    except (FileNotFoundError, subprocess.TimeoutExpired, ValueError, IndexError):
+        pass
+
+    return {"device": "cpu", "gpu_name": None, "vram_mb": 0}