关于动态配置读取

我注意到`3.x`版本把原本完全使用`archaius API`读取配置的部分全部换掉了，在`DynamicPropertiesImpl`中通过`Environment`来读取配置，这是为什么，为了更接入Spring原生的操作吗？

然后我按照文档[在程序中读取配置信息](https://servicecomb.apache.org/references/java-chassis/zh_CN/config/read-config.html)试了下，使用`dynamicProperties.getStringProperty()`无法读到配置的变化，然后我看了下`[servicecomb-java-chassis](https://github.com/apache/servicecomb-java-chassis)`的测试:

```java
HashMap updated = new HashMap<>();
updated.put(stringPropertyName, newValue);
EventManager.post(ConfigurationChangedEvent.createIncremental(updated));
```

运行没有问题，但是按照文档那样以非mock的方式测试就读不到配置的变化，请问是有什么遗漏的额外配置吗？

我测试时用的是基于[开发第一个微服务应用](https://servicecomb.apache.org/references/java-chassis/zh_CN/start/first-sample.html)里 `bmi` 那个示例改写的。

```Java
@RestSchema(schemaId = "ProviderController")
@RequestMapping(path = "/provider")
public class ProviderController {
private DynamicProperties dynamicProperties;

@Autowired
private Environment environment;

private String example;

@Autowired
public ProviderController(DynamicProperties dynamicProperties) {
this.dynamicProperties = dynamicProperties;
// 在构造函数中注册回调，这样配置变化时会自动更新 example 值
this.example = this.dynamicProperties.getStringProperty("basic.example",
value -> {
System.out.println("Configuration changed, new value: " + value);
this.example = value;
}, "not set");
}

@GetMapping(path = "/example")
public String getExampleValue() {
String dynamicValue = dynamicProperties.getStringProperty("basic.example", "not set");
String envValue = environment.getProperty("basic.example", "not set");
System.out.println("Dynamic value: " + dynamicValue);
System.out.println("Environment value: " + envValue);
return example;
}
}
```
不管是用 `dynamicProperties` 还是 `environment` 都读不到变化。

Inizia confrontando DynamicPropertiesImpl e DynamicProperties.getStringProperty con l’esempio ProviderController, quindi traccia il modo in cui vengono propagate le modifiche a Environment e il modo in cui EventManager pubblica ConfigurationChangedEvent. Riproduci il comportamento con l’esempio BMI e documenta la configurazione necessaria oppure identifica il percorso di aggiornamento mancante, in modo che sia dynamicProperties sia environment riflettano un valore modificato.

Scritto dal modello di indicizzazione a partire dal testo della issue.