chore: add detailed GPU diagnostics logs

inference.py

@@ -431,6 +431,17 @@ def run_inference(
     detectors = None
     depth_estimators = None
 
+    # DIAGNOSTICS
+    logging.info("--- GPU DIAGNOSTICS ---")
+    logging.info("Torch version: %s", torch.__version__)
+    logging.info("CUDA available: %s", torch.cuda.is_available())
+    logging.info("Device count: %d", torch.cuda.device_count())
+    logging.info("Current device: %s", torch.cuda.current_device() if torch.cuda.is_available() else "N/A")
+    for k, v in os.environ.items():
+        if "CUDA" in k or "NVIDIA" in k:
+            logging.info("Env %s=%s", k, v)
+    logging.info("-----------------------")
+
     if num_gpus > 1:
         logging.info("Detected %d GPUs. Enabling Multi-GPU inference.", num_gpus)
         # Initialize one detector per GPU