Summary

• add a tracked-file Unicode scan
• wire the Unicode scan into validate CI
• convert existing source text to ASCII-only equivalents while keeping Unicode behavior tests via escapes

Test plan

• uv run python tests/unicode_scan.py
• uv run python -m unittest tests.test_unicode_scan tests.test_tsv
• uv run ruff check tests/unicode_scan.py tests/test_unicode_scan.py tests/test_tsv.py src/src_py_lib/utils/logging.py