Feat/config deafult (#768)

* feat: update config

* update bocha

Author: fridayL

src/memos/api/config.py

@@ -468,7 +468,7 @@ def get_internet_config() -> dict[str, Any]:
         return {
             "backend": "bocha",
             "config": {
-                "api_key": os.getenv("BOCHA_API_KEY"),
+                "api_key": os.getenv("BOCHA_API_KEY", "bocha"),
                 "max_results": 15,
                 "num_per_request": 10,
                 "reader": {