[Model] Complete dots.note.omni support with native encoders, video preprocessing, and MTP decoding (#33829)

Co-authored-by: miraclezqc <dysania@pku.edu.cn>

python/sglang/srt/server_args.py

@@ -5371,6 +5371,7 @@ class ServerArgs:
             "PixtralForConditionalGeneration",
             "GlmMoeDsaForCausalLM",
             "LongcatFlashForCausalLM",
+            "Dots3NoteForCausalLM",
         ]:
             # Set attention backend for DeepSeek
             if is_deepseek_dsa(hf_config):  # DeepSeek 3.2/GLM 5
@@ -7855,6 +7856,7 @@ class ServerArgs:
             "Qwen3OmniMoeForConditionalGeneration",
             "Qwen2AudioForConditionalGeneration",
             "Qwen2_5OmniForConditionalGeneration",
+            "Dots3NoteForCausalLM",
             "KimiVLForConditionalGeneration",
             "KimiK25ForConditionalGeneration",
             "KimiK3ForConditionalGeneration",
@@ -7862,7 +7864,8 @@ class ServerArgs:
         ]:
             raise ValueError(
                 f"Model type {model_arch} is not supported for encoder disaggregation. "
-                f"Supported architectures: Qwen2VL, Qwen3VL, Qwen3.5, InternS2, Qwen2Audio, Qwen2.5Omni, Kimi, MiMoV2."
+                f"Supported architectures: Qwen2VL, Qwen3VL, Qwen3.5, InternS2, "
+                f"Qwen2Audio, Qwen2.5Omni, Dots3-Note, Kimi, MiMoV2."
             )
 
     def _validate_ib_devices(self, device_str: Optional[str]) -> Optional[str]: