🐛 fix(tsl_syntax): repair lookup engine and reconcile reference facts

lookup.py: exempt code-anchored ASCII identifiers from the mixed
zh/en gate so exact hits are no longer dropped; dedup parent/child
sections in results; validate write-prelude anchors in --check.

references: correct interpreter-verified facts (case-as-expression,
control-flow semicolons, __line__/__stack_frame, tslObjects order,
destroy timing, ErrDefine, truncated outputs), fix headings, scope
qualifiers and reversed quotes; strip dead preamble metadata from all
24 pages.

packaging: exclude __pycache__/*.pyc from playbook and bundle copies;
update build test file-count assertion to match.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

skills/tsl-syntax-reference/references/02_core_model.md

@@ -1,10 +1,5 @@
 # TSL 文件模型规则
 
-文档类型：语法主线
-是否可直接用于生成代码：是
-是否含可直接照写示例：是
-是否含不可照写反例：是
-
 本篇说明 TSL 的文件模型判断规则：智能体如何区分 `.tsl` 可执行脚本与 `.tsf` 可复用声明文件，如何识别脚本语句区和声明区，以及为什么很多错误其实是“文件模型选错了”。
 
 ## 本篇职责