feat(knowledge): add service library

backend/hermes/app/core/config.py

@@ -15,6 +15,8 @@ class Settings(BaseSettings):
     initial_admin_password: str | None = None
     initial_admin_first_name: str = ""
     initial_admin_last_name: str = ""
+    knowledge_storage_path: str = "/data/knowledge"
+    knowledge_max_upload_mb: int = 50
 
     model_config = SettingsConfigDict(
         env_file=".env",