feat(api): 添加 graphrag 权限规则和优化知识图谱缓存失效

- 在权限规则匹配器中添加 /api/graphrag/** 的读写权限控制
- 修改图关系服务中的删除操作以精确失效相关实体缓存
- 更新图同步服务确保 BELONGS_TO 关系在增量同步时正确重建
- 重构图同步步骤服务中的组织归属关系构建逻辑
- 修复前端图_canvas 组件中的元素点击事件处理逻辑
- 实现 Python GraphRAG 缓存的启用/禁用功能
- 为 GraphRAG 缓存统计和清除接口添加调用方日志记录

backend/api-gateway/src/main/java/com/datamate/gateway/security/PermissionRuleMatcher.java

@@ -50,6 +50,7 @@ public class PermissionRuleMatcher {
         addModuleRules(permissionRules, "/api/content-generation/**", "module:content-generation:use", "module:content-generation:use");
         addModuleRules(permissionRules, "/api/task-meta/**", "module:task-coordination:read", "module:task-coordination:write");
         addModuleRules(permissionRules, "/api/knowledge-graph/**", "module:knowledge-graph:read", "module:knowledge-graph:write");
+        addModuleRules(permissionRules, "/api/graphrag/**", "module:knowledge-base:read", "module:knowledge-base:write");
 
         permissionRules.add(new PermissionRule(READ_METHODS, "/api/auth/users/**", "system:user:manage"));
         permissionRules.add(new PermissionRule(WRITE_METHODS, "/api/auth/users/**", "system:user:manage"));