不支持 @ConditionalOnProperty 注解

@ConditionalOnProperty注解上条件计算要早于 ConfigCenterPropertyPlaceholderConfigurer 拉取配置的时间，导致该配置中心客户端无法支持最基本的spring-boot条件装配功能。

Start by tracing how @ConditionalOnProperty is evaluated relative to ConfigCenterPropertyPlaceholderConfigurer fetching configuration. Review the Spring Boot integration points and establish a reproducible conditional-configuration case. Done should mean the client supports this basic conditional auto-configuration behavior, with verification covering evaluation against remotely fetched properties.

Written by the indexing model from the issue text.