fix: reranker config bug (#278)

* feat: parallel doc process

* add memory size config for tree

* feat: add reranker Facktory

* feat: pass reranker from tree config

* feat: add reranker config in mos product

* style: modify annotation

* feat: slightly adjust similarity threshold for returned memories

* test: fix researcher test script

* fix: reranker config bug

Author: CaralHsi

src/memos/api/config.py

@@ -97,7 +97,7 @@ def get_reranker_config() -> dict[str, Any]:
 
         if embedder_backend == "http_bge":
             return {
-                "backend": "universal_api",
+                "backend": "http_bge",
                 "config": {
                     "url": os.getenv("MOS_RERANKER_URL"),
                     "model": "bge-reranker-v2-m3",