feat: 完善差旅票据行程提取与费用明细回填逻辑

增强文档智能识别的票据场景关键词和字段提取能力，优化
会话关联草稿报销单的解析路径，修复费用明细合并和票据
去重边界问题，前端改进报销创建和审批详情交互，补充单
元测试覆盖。

server/src/app/services/orchestrator.py

@@ -119,10 +119,11 @@ class OrchestratorService:
                 context_json=context_json,
             )
             conversation_id = conversation.conversation_id
-            context_json = self.conversation_service.hydrate_context_json(
-                conversation=conversation,
-                context_json=context_json,
-            )
+            context_json = self.conversation_service.hydrate_context_json(
+                conversation=conversation,
+                context_json=context_json,
+                message=payload.message,
+            )
 
         route_json: dict[str, Any] = {
             "orchestrated_by": AgentName.ORCHESTRATOR.value,