fix(adr): adr-judge lefthook job — Python UTF-8 mode for Cyrillic diffs

adr-judge crashed (UnicodeEncodeError: surrogate '\udc98') when the staged diff contained non-ASCII content: Python reads piped stdin with the Windows cp1251 console codepage, not UTF-8, so a Cyrillic diff mis-decodes into surrogates and dies at diff_text.encode('utf-8'). '-X utf8' forces Python UTF-8 mode. Task 5's red-test probe was ASCII, so the crash went unseen until Task 6's Cyrillic docs/architecture files. adr-judge's file reads already use explicit encoding='utf-8'; only stdin was affected.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

lefthook.yml

@@ -121,8 +121,10 @@ pre-commit:
     # правила к staged-дифу. Вендорен из adr-kit v0.13.1 (MIT) → tools/adr-judge.py;
     # пере-вендорить после `/adr-kit:upgrade`. Без --llm → только regex, без вызова
     # Claude API, нулевая стоимость (AK6). Без glob — adr-judge нужен весь staged-диф.
+    # `-X utf8` обязателен: stdin Python на Windows = cp1251; диф с кириллицей иначе
+    # ломается на surrogate → UnicodeEncodeError (crash, не ADR-violation).
     - name: adr-judge
-      run: git diff --cached --unified=0 | python tools/adr-judge.py --diff - --adr-dir docs/adr/
+      run: git diff --cached --unified=0 | python -X utf8 tools/adr-judge.py --diff - --adr-dir docs/adr/
       fail_text: |
         adr-judge: staged-изменение нарушает задокументированное архитектурное
         решение (ADR). Смотри file:line выше и docs/adr/ADR-*.md.