🐛 fix(vscode): 摘修复列表与角标认 cherry-pick -x 尾注，解过冲突的复制品不再重复显示

解过冲突的 cherry-pick 复制品补丁内容已变，按文件指纹对不上，列表和角标
都把它当没摘。现在额外扫发布分支独有提交的说明，`(cherry picked from
commit <sha>)` 尾注命中的来源提交直接判已摘，列表过滤与 rev-list 计数同步扣掉。

Claude-Session: https://claude.ai/code/session_018HDxMmNDyfLa3bMTUctBzt

vscode/package.json

@@ -2,7 +2,7 @@
   "publisher": "clurdra",
   "name": "superpowers-vscode-clurdra",
   "displayName": "Superpowers-clurdra",
-  "version": "0.2.120",
+  "version": "0.2.121",
   "packageManager": "pnpm@10.27.0",
   "description": "Superpowers specs and plans Kanban explorer",
   "author": "clurdra",