On Windows, services and terminals default to cp1252 encoding. The CLI
uses box-drawing characters (┌│├└─) in banners, doctor output, and
status displays. When print() tries to encode these under cp1252, an
unhandled UnicodeEncodeError crashes the gateway on startup.
This fix adds early UTF-8 enforcement in hermes_cli/__init__.py:
- Sets PYTHONUTF8=1 and PYTHONIOENCODING=utf-8
- Re-opens stdout/stderr with UTF-8 encoding if not already UTF-8
Runs at import time so it protects all CLI subcommands. No effect on
Unix (gated on sys.platform == "win32"). Backwards-compatible: on
systems already using UTF-8, the function is a no-op.
Fixes#10956
2d7543c61f