fix: Use speculators_model_type for method field instead of hardcoding

- Changed method field in vllm_config to use speculators_config.get("speculators_model_type", "eagle")
- This allows the method to be dynamically set based on the speculators model type
- Maintains backward compatibility with default value of "eagle"

Signed-off-by: rtuli@redhat.com

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>
Signed-off-by: Rahul Tuli <rtuli@redhat.com>

Author: rahul-tuli

vllm/transformers_utils/configs/speculators_eagle.py

@@ -88,7 +88,7 @@ def _convert_speculators_to_vllm(cls, speculators_config: dict) -> dict:
             "model": transformer_config,
             "eagle_fc_bias": speculators_config.get("fusion_bias", False),
             "truncated_vocab_size": transformer_config.get("vocab_size"),
-            "method": "eagle",  # Required for V1 compatibility
+            "method": speculators_config.get("speculators_model_type", "eagle"),  # Use speculators_model_type
         }
 
         # Preserve any additional fields that might be needed