fix: update embedding method to use embed_documents for improved performance

Author: wxg0103

apps/models_provider/impl/ollama_model_provider/model/embedding.py

@@ -44,6 +44,4 @@ def embed_query(self, text: str) -> List[float]:
         Returns:
             Embeddings for the text.
         """
-        instruction_pair = f"{text}"
-        embedding = self._embed([instruction_pair])[0]
-        return embedding
+        return self.embed_documents([text])[0]