v0.6.4

Fixed

• keep X20+ state 21 labeled as the official WashingMopPause value across CLI and Mission Control surfaces
• preserve separate clean/dirty-water recovery guidance instead of baking that advice into the state name
• keep the tank auto-reset heuristic aligned with the corrected state-21 label

Validation

• .venv/bin/python -m pytest tests/ -v
• .venv/bin/ruff check src/ tests/
• .venv/bin/ruff format --check src/ tests/
• .venv/bin/mypy src/xiao/