Add Mistral Large 3 Eagle Support (#14466)

Co-authored-by: Linda-Stadter <57756729+Linda-Stadter@users.noreply.github.com>

python/sglang/srt/configs/model_config.py

@@ -338,6 +338,7 @@ class ModelConfig:
             or "DotsVLMForCausalLM" in self.hf_config.architectures
             or "MistralLarge3ForCausalLM" in self.hf_config.architectures
             or "PixtralForConditionalGeneration" in self.hf_config.architectures
+            or "MistralLarge3ForCausalLMEagle" in self.hf_config.architectures
         ):
             self.head_dim = 256
             self.attention_arch = AttentionArch.MLA
@@ -702,7 +703,16 @@ class ModelConfig:
             if self.quantization is None:
                 self.quantization = quant_method
             elif self.quantization != quant_method:
-                if (
+                # Allow auto-detection of quantization from checkpoint for draft model
+                # even if it differs from main model's quantization
+                if self.is_draft_model:
+                    logger.info(
+                        f"Draft model quantization ({quant_method}) differs from "
+                        f"main model quantization ({self.quantization}). "
+                        f"Using draft model's detected quantization: {quant_method}"
+                    )
+                    self.quantization = quant_method
+                elif (
                     self.quantization not in compatible_quantization_methods
                     or quant_method
                     not in compatible_quantization_methods[self.quantization]