Unify NVIDIA GPU recovery paths

audit/internal/platform/nvidia_recover.go

@@ -3,6 +3,8 @@ package platform
 import (
 	"fmt"
 	"os/exec"
+	"strconv"
+	"strings"
 	"time"
 )
 
@@ -28,3 +30,22 @@ func runNvidiaRecover(args ...string) (string, error) {
 	raw, err := exec.Command("sudo", helperArgs...).CombinedOutput()
 	return string(raw), err
 }
+
+func resetNvidiaGPU(index int) (string, error) {
+	if index < 0 {
+		return "", fmt.Errorf("gpu index must be >= 0")
+	}
+	out, err := runNvidiaRecover("reset-gpu", strconv.Itoa(index))
+	if strings.TrimSpace(out) == "" && err == nil {
+		out = "GPU reset completed.\n"
+	}
+	return out, err
+}
+
+func restartNvidiaDrivers() (string, error) {
+	out, err := runNvidiaRecover("restart-drivers")
+	if strings.TrimSpace(out) == "" && err == nil {
+		out = "NVIDIA drivers restarted.\n"
+	}
+	return out, err
+}