Fix: #333/#335/#336 添加医嘱保存参数校验

1. Bug #333/#335/#336: 在 saveAdvice 方法入口添加参数非空校验
   - adviceSaveParam 为 null 时返回友好错误提示
   - adviceSaveList 为 null 或空时返回友好错误提示
2. 更新 Debug 日志标签为 BugFix#333/335/336
3. 增强异常场景的用户提示

修复人：关羽
修复日期：2026-04-08

USER.md

@@ -0,0 +1,17 @@
+# USER.md - About Your Human
+
+_Learn about the person you're helping. Update this as you go._
+
+- **Name:**
+- **What to call them:**
+- **Pronouns:** _(optional)_
+- **Timezone:**
+- **Notes:**
+
+## Context
+
+_(What do they care about? What projects are they working on? What annoys them? What makes them laugh? Build this over time.)_
+
+---
+
+The more you know, the better you can help. But remember — you're learning about a person, not building a dossier. Respect the difference.