fix: address code review issues from Claude and GPT-5.2

- report/SKILL.md: add AskUserQuestion to allowed-tools
- validate_json.py: remove unused imports (List, Any)
- validate_json.py: sort output lists for deterministic order
- validate_json.py: limit recursion to category level only
- validate_json.py: add list-of-dict handling
- EN validate_json.py: remove Chinese from CATEGORY_MAPPING
- EN deep/SKILL.md: change output language from Chinese to English
- deep/SKILL.md: add slug handling for filenames
- report/SKILL.md: fix uncertain_fields -> uncertain naming
- README: add PyYAML dependency note

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

skills/research-zh/report/SKILL.md

@@ -1,6 +1,6 @@
 ---
 description: 将deep调研结果汇总为markdown报告，覆盖所有字段，跳过不确定值。
-allowed-tools: Read, Write, Glob, Bash
+allowed-tools: Read, Write, Glob, Bash, AskUserQuestion
 ---
 
 # Research Report - 汇总报告
@@ -75,7 +75,7 @@ CATEGORY_MAPPING = {
 收集JSON中有但fields.yaml中没定义的字段，放入"其他信息"分类。注意过滤：
 - 内部字段：`_source_file`, `uncertain`
 - 嵌套结构顶级key：`basic_info`, `technical_features`等
-- `uncertain_fields`列表：需要逐行显示每个字段名，不要压缩成一行
+- `uncertain`数组：需要逐行显示每个字段名，不要压缩成一行
 
 **5. 不确定值跳过**
 跳过条件：