如果reg匹配为空，则进行向量的全文检索

agent/pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "agent"
-version = "0.1.3"
+version = "0.1.4"
 description = "Default template for PDM package"
 authors = [
     {name = "jiayongqiang", email = "15936285643@163.com"},