Handle multiple response formats in OllamaEmbeddingEngine (#1735)

The OllamaEmbeddingEngine is compatible with OpenAI

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cognee/infrastructure/databases/vector/embeddings/OllamaEmbeddingEngine.py

@@ -124,7 +124,10 @@ class OllamaEmbeddingEngine(EmbeddingEngine):
                 self.endpoint, json=payload, headers=headers, timeout=60.0
             ) as response:
                 data = await response.json()
-                return data["embeddings"][0]
+                if "embeddings" in data:
+                    return data["embeddings"][0]
+                else:
+                    return data["data"][0]["embedding"]
 
     def get_vector_size(self) -> int:
         """