设置全局兼容性：
```
PUT http://schema-registry:8081/config
{
"compatibility": "BACKWARD"
}
```
为主题设置兼容性：
```
PUT http://schema-registry:8081/subjects/orders-value/config
{
"compatibility": "FULL"
}
```
注册 Avro 模式：
```
POST http://schema-registry:8081/subjects/orders-value/versions
{
"schema": "{\"type\":\"record\",\"name\":\"Order\",\"fields\":[{\"name\":\"id\",\"type\":\"string\"},{\"name\":\"amount\",\"type\":\"double\"}]}"
}
```
验证兼容性：
```
POST http://schema-registry:8081/compatibility/subjects/orders-value/versions/latest
{
"schema": "{\"type\":\"record\",\"name\":\"Order\",\"fields\":[{\"name\":\"id\",\"type\":\"string\"},{\"name\":\"amount\",\"type\":\"double\"},{\"name\":\"currency\",\"type\":\"string\",\"default\":\"USD\"}]}"
}
```
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