Update OpenAI embedding handling for both list and base64 embeddings

- Fix OpenAI embedding array parsing
- Improve embedding data type safety

.gitignore

@@ -70,4 +70,5 @@ gui/
 test_*
 
 # Cline files
+memory-bank
 memory-bank/

lightrag/llm/openai.py

@@ -477,7 +477,8 @@ async def openai_embed(
         )
         return np.array(
             [
-                np.frombuffer(base64.b64decode(dp.embedding), dtype=np.float32)
+                np.array(dp.embedding, dtype=np.float32) if isinstance(dp.embedding, list)
+                else np.frombuffer(base64.b64decode(dp.embedding), dtype=np.float32)
                 for dp in response.data
             ]
         )