feat(memcube): single cube use general_llm (#1253)

* feat: add backend for openai

* feat: change memreader for scheaduer

* feat: change singlecube llm

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Co-authored-by: harvey_xiang <harvey_xiang@163.com>

Author: fridayL

src/memos/multi_mem_cube/single_cube.py

@@ -617,7 +617,7 @@ def add_before_search(
 
         # 3. Call LLM
         try:
-            raw = self.mem_reader.llm.generate([{"role": "user", "content": prompt}])
+            raw = self.mem_reader.general_llm.generate([{"role": "user", "content": prompt}])
             success, parsed_result = parse_keep_filter_response(raw)
 
             if not success: