Small config updates

olmocr/train/configs/example_config.yaml

@@ -8,20 +8,20 @@ run_name: qwen2.5-vl-7b-finetune
 model:
   name: Qwen/Qwen2.5-VL-7B-Instruct
   trust_remote_code: true
-  torch_dtype: auto
+  torch_dtype: bfloat16
   use_flash_attention: true
   attn_implementation: flash_attention_2
   
   # LoRA settings (disabled by default)
   use_lora: false
-  lora_rank: 8
-  lora_alpha: 32
-  lora_dropout: 0.1
-  lora_target_modules:
-    - q_proj
-    - v_proj
-    - k_proj
-    - o_proj
+  # lora_rank: 8
+  # lora_alpha: 32
+  # lora_dropout: 0.1
+  # lora_target_modules:
+  #   - q_proj
+  #   - v_proj
+  #   - k_proj
+  #   - o_proj
 
 # Dataset configuration
 dataset: