feat: 任务书 11，指标名加候选前缀、消融重做接着改、判重说明补关键设定

- 假设专用指标短名不能含"."（最长 64），冻结时由 materials 的 freezeProtocol 改为全名"候选编号.短名"；可引用清单用全名，已占用清单只剩任务指标和两个保留键。
- 消融格核验不通过重做时，工作目录是上一次交的这一格代码的副本，能读的版本加上它，完整代码照旧列出；消融实现提示词同步改。
- jev 判重材料说明补 keySettings 一句。
- 结构.md 第八部分 vocab、materials、jev，WORK_LOG 同步更新。

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/jev/questions.ts

@@ -31,6 +31,7 @@ const TASKS: Readonly<Record<Site, string>> = {
   dedup:
     "Two research proposals from the same round of a study that improves a program by changing its code. " +
     "Each proposal lists its change as `factors`: one or more separate edits, each with a short `name` and a `method` saying what to change and how. " +
+    "Each factor also has `keySettings`: the setting values that decide its effect, such as a step size or a time window (\"无\" when there are none). " +
     "Together the factors of one proposal are the whole change that one implementation would carry out. " +
     "The proposals were written by different researchers, in Chinese or English.",
   freeze: