feat: 实现配置删除通知机制（deletedKeys）

- 服务端 fetchChangedConfigs 接口新增 deletedKeys 字段，返回已删除配置的 key 列表
- Go/Node.js/Python/Spring Boot 客户端支持解析 deletedKeys 并删除本地配置
- Spring Boot 客户端新增 removeConfigs 方法，同步更新 Spring Environment

kenaito-conf-go-client/client.go

@@ -223,6 +223,18 @@ func (c *Client) fetchChanged() error {
 		delete(wrapper.Data, "latest.fetch.timestamp")
 	}
 
+	// 处理删除的配置
+	if deletedKeysStr, ok := wrapper.Data["deletedKeys"]; ok && deletedKeysStr != "" {
+		deletedKeys := strings.Split(deletedKeysStr, ",")
+		c.mu.Lock()
+		for _, key := range deletedKeys {
+			delete(c.configs, key)
+		}
+		c.mu.Unlock()
+		log.Printf("[ConfigClient] %d configs deleted", len(deletedKeys))
+		delete(wrapper.Data, "deletedKeys")
+	}
+
 	if len(wrapper.Data) > 0 {
 		changed := make(map[string]string)
 		for k, v := range wrapper.Data {

kenaito-conf-nodejs-client/lib/client.js

@@ -127,6 +127,17 @@ export class ConfigClient {
     }
     delete changedData['latest.fetch.timestamp'];
 
+    // 处理删除的配置
+    const deletedKeysStr = changedData['deletedKeys'];
+    if (deletedKeysStr) {
+      const deletedKeys = deletedKeysStr.split(',');
+      for (const key of deletedKeys) {
+        delete this.configs[key];
+      }
+      console.info('[ConfigClient]', deletedKeys.length, 'configs deleted');
+      delete changedData['deletedKeys'];
+    }
+
     const changed = {};
     for (const [k, v] of Object.entries(changedData)) {
       changed[k] = v;

kenaito-conf-python-client/kenaito_conf/client.py

@@ -103,6 +103,15 @@ class ConfigClient:
         if ts:
             self._last_time = int(ts)
 
+        # 处理删除的配置
+        deleted_keys_str = changed_data.pop("deletedKeys", None)
+        if deleted_keys_str:
+            deleted_keys = deleted_keys_str.split(",")
+            with self._lock:
+                for key in deleted_keys:
+                    self._configs.pop(key, None)
+            logger.info("[ConfigClient] %d configs deleted", len(deleted_keys))
+
         if changed_data:
             changed = {}
             for k, v in changed_data.items():

kenaito-conf-springboot2-client/src/main/java/cn/odboy/confcenter/ConfigcenterContext.java

@@ -415,6 +415,42 @@ public class ConfigcenterContext {
         }
     }
 
+    public synchronized void removeConfigs(List<String> keys) {
+        for (String key : keys) {
+            localProps.remove(key);
+            logger.info("Config [{}] removed", key);
+        }
+        // Update Spring Environment property source
+        if (applicationContext != null) {
+            StandardEnvironment environment = (StandardEnvironment) applicationContext.getEnvironment();
+            MutablePropertySources propertySources = environment.getPropertySources();
+            synchronized (propertySources) {
+                if (propertySources.contains(MANAGER_PROPERTY_SOURCE)) {
+                    Properties properties = new Properties();
+                    Object source = propertySources.get(MANAGER_PROPERTY_SOURCE);
+                    if (source instanceof MapPropertySource) {
+                        Map<String, Object> map = ((MapPropertySource) source).getSource();
+                        for (Entry<String, Object> entry : map.entrySet()) {
+                            if (!keys.contains(entry.getKey())) {
+                                properties.put(entry.getKey(), entry.getValue());
+                            }
+                        }
+                    } else if (source instanceof PropertiesPropertySource) {
+                        Map<String, Object> src = ((PropertiesPropertySource) source).getSource();
+                        for (Entry<String, Object> entry : src.entrySet()) {
+                            if (!keys.contains(entry.getKey())) {
+                                properties.put(entry.getKey(), entry.getValue().toString());
+                            }
+                        }
+                    }
+                    propertySources.replace(MANAGER_PROPERTY_SOURCE, new PropertiesPropertySource(MANAGER_PROPERTY_SOURCE, properties));
+                }
+            }
+        }
+        // Refresh @Value and @ConfigurationProperties fields
+        refreshDynamicConfigFields();
+    }
+
     private void refreshDynamicConfigFields() {
         if (applicationContext != null) {
             try {

kenaito-conf-springboot2-client/src/main/java/cn/odboy/confcenter/InternalConfigChangeListener.java

@@ -63,6 +63,15 @@ public class InternalConfigChangeListener {
 							if (data.containsKey(LATEST_FETCH_TIMESTAMP)) {
 								params.put("lastTime", Long.parseLong(data.remove(LATEST_FETCH_TIMESTAMP).toString()));
 							}
+							// 处理删除的配置
+							if (data.containsKey("deletedKeys")) {
+								String deletedKeysStr = (String) data.remove("deletedKeys");
+								if (deletedKeysStr != null && !deletedKeysStr.isEmpty()) {
+									String[] deletedKeys = deletedKeysStr.split(",");
+									context.removeConfigs(java.util.Arrays.asList(deletedKeys));
+									logger.info("[ConfigClient] {} configs deleted", deletedKeys.length);
+								}
+							}
 							if (!data.isEmpty()) context.updateConfig(data);
 						}
 					}

server/internal/handler/config_api.go

@@ -9,6 +9,7 @@ import (
 	"net"
 	"net/http"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/gin-gonic/gin"
@@ -172,6 +173,32 @@ func (h *ConfigApiHandler) FetchChangedConfigs(c *gin.Context) {
 	result := make(map[string]string)
 	var configIds []int
 
+	// 查询已删除的配置（enabled=0 且 updated_at > lastTime），返回 deletedKeys
+	var deletedKeys []string
+	if !req.IgnoreGlobal && app.GroupId != nil {
+		var deletedGlobalConfigs []model.AppConfig
+		dao.Engine.Where("env = ? AND version = ? AND enabled = 0 AND group_id = ? AND (app_id is null OR app_id = 0) AND updated_at > ?",
+			req.Env, version, *app.GroupId, lastUpdateTime).Find(&deletedGlobalConfigs)
+		for _, cfg := range deletedGlobalConfigs {
+			kvMap := h.parseService.ParseConfigToKVMap(&cfg)
+			for k := range kvMap {
+				deletedKeys = append(deletedKeys, k)
+			}
+		}
+	}
+	var deletedAppConfigs []model.AppConfig
+	dao.Engine.Where("env = ? AND version = ? AND enabled = 0 AND app_id = ? AND updated_at > ?",
+		req.Env, version, app.Id, lastUpdateTime).Find(&deletedAppConfigs)
+	for _, cfg := range deletedAppConfigs {
+		kvMap := h.parseService.ParseConfigToKVMap(&cfg)
+		for k := range kvMap {
+			deletedKeys = append(deletedKeys, k)
+		}
+	}
+	if len(deletedKeys) > 0 {
+		result["deletedKeys"] = strings.Join(deletedKeys, ",")
+	}
+
 	// load global changed configs
 	if !req.IgnoreGlobal && app.GroupId != nil {
 		var globalConfigs []model.AppConfig