[New Model]: jinaai/jina-embeddings-v3 (#16120)

vllm/config.py

@@ -1130,6 +1130,11 @@ class ModelConfig:
         architectures = getattr(self.hf_config, "architectures", [])
         return ModelRegistry.is_v1_compatible(architectures)
 
+    @property
+    def is_matryoshka(self) -> bool:
+        return (hasattr(self.hf_config, "matryoshka_dimensions")
+                or getattr(self.hf_config, "is_matryoshka", False))
+
 
 class CacheConfig:
     """Configuration for the KV cache.