Create more spans for Spring

### Problem Statement

There are very few spans created by the Spring integration. Having extra spans may help developers fix slow requests.

### Solution Brainstorm

We could:
- create spans for request filter chain
- create spans for caches
- create spans for view creation

該 issue 未指出任何檔案、測試或進入點。首先定位 Spring 整合及其現有的 span 建立，然後評估 brainstorm 中提到的請求篩選器鏈、快取和檢視建立。完成意味著就新增 span 達成共識，並透過涵蓋預期行為的測試來實作它們。

由索引模型根據 Issue 內容生成。