rename model_type: vggt_direct -> caminject

args.json

@@ -202,7 +202,7 @@
   "ray_exp_name": null,
   "device_groups": null,
   "model": "Qwen/Qwen3-VL-4B-Instruct",
-  "model_type": "qwen3_vl_vggt_direct",
+  "model_type": "qwen3_vl_caminject",
   "model_revision": null,
   "task_type": "causal_lm",
   "torch_dtype": "bfloat16",