refactor: 重构项目结构并优化类型定义

- 移除extension模块，将功能迁移至node-agent
- 修复类型导出问题，使用export type明确类型导出
- 统一数据库连接方式，从直接导入改为使用config/database
- 更新文档中的项目结构描述
- 添加多个服务的实用方法，如getForecast、getBalances等
- 修复类型错误和TS1205警告
- 优化RedisService调用方式
- 添加新的实体类型定义
- 更新审计日志格式，统一字段命名

server/src/core/security/AgentTraceAuditService.ts

@@ -74,9 +74,9 @@ export class AgentTraceAuditService {
     let reasoning = 'No explicit reasoning found.';
     let decisionDetails: any = null;
     if (params.decisionId) {
-      const explanation = await ExplainableAIService.getExplanation(params.decisionId, params.tenantId);
-      reasoning = explanation?.explanation?.logic || reasoning;
-      decisionDetails = explanation?.decision;
+      const explanation = await ExplainableAIService.getExplanation(params.decisionId);
+      reasoning = explanation?.reasoning || reasoning;
+      decisionDetails = explanation?.inputFactors;
     }
     
     // 2. 生产级合规性校验 (Zero-Mock)