Fix service_module schema

pqai_agent/data_models/service_module.py

@@ -19,4 +19,4 @@ class ServiceModule(Base):
     default_agent_id = Column(BigInteger, nullable=True, comment="默认Agent ID")
     is_delete = Column(Boolean, nullable=False, default=False, comment="逻辑删除标识")
     create_time = Column(TIMESTAMP, nullable=False, server_default="CURRENT_TIMESTAMP", comment="创建时间")
-    update_time = Column(TIMESTAMP, nullable=False, server_default="CURRENT_TIMESTAMP", onupdate="CURRENT_TIMESTAMP", comment="更新时间")
+    update_time = Column(TIMESTAMP, nullable=False, server_default="CURRENT_TIMESTAMP", server_onupdate="CURRENT_TIMESTAMP", comment="更新时间")