feat(doc): update documentation

documentation/docs/guide/extensions/cosid-spring-boot-starter.md

@@ -22,4 +22,89 @@ _Spring-Boot-Starter_ 模块 集成了所有 _CosId_ 扩展，提供了自动装
         </dependency>
     </dependencies>
 ```
-:::
+:::
+
+## Actuate
+
+CosId-Spring-Boot-Starter 模块提供了 actuator 支持，可以通过 actuator 端点查看 CosId 的状态。
+
+![CosId actuator](../../public/assets/spring-boot-starter/swagger-ui.png)
+
+### CosIdEndpoint
+
+用于查看所有定义的 Id 生成器状态信息。
+
+:::code-group
+```shell [curl]
+curl -X GET "http://localhost:8080/actuator/cosid" -H  "accept: */*"
+```
+```json [响应内容]
+{
+  "cosid": {
+    "kind": "ClockSyncCosIdGenerator",
+    "actual": {
+      "kind": "Radix62CosIdGenerator",
+      "machineId": 252,
+      "lastTimestamp": 1704183358593,
+      "converter": {
+        "kind": "RadixCosIdStateParser",
+        "actual": null
+      }
+    },
+    "converter": {
+      "kind": "RadixCosIdStateParser",
+      "actual": null
+    }
+  },
+  "user": {
+    "kind": "StringSegmentId",
+    "actual": {
+      "kind": "SegmentChainId",
+      "fetchTime": 1703401907,
+      "maxId": 91658,
+      "offset": 91638,
+      "sequence": 91638,
+      "step": 20,
+      "isExpired": false,
+      "isOverflow": false,
+      "isAvailable": true,
+      "converter": {
+        "kind": "Radix62IdConverter",
+        "radix": 62,
+        "charSize": 11,
+        "padStart": true,
+        "maxId": 9223372036854776000
+      }
+    },
+    "converter": {
+      "kind": "Radix62IdConverter",
+      "radix": 62,
+      "charSize": 6,
+      "padStart": true,
+      "maxId": 56800235584
+    }
+  }
+}
+```
+:::
+
+### CosIdGeneratorEndpoint
+
+提供了生成 `long` 类型 ID 的 API 接口。
+
+### CosIdStringGeneratorEndpoint
+
+提供了生成 `string` 类型 ID 的 API 接口。
+
+### 配置
+
+```yaml {6-8}
+management:
+  endpoints:
+    web:
+      exposure:
+        include:
+          - cosid
+          - cosidGenerator
+          - cosidStringGenerator
+```