A Debian major upgrade (e.g. 12 -> 13) replaces /usr/bin/python3
(3.11 -> 3.13). Existing venvs still resolve `python3` to the system
interpreter, but their packages live in lib/python3.11/site-packages,
which the new interpreter never searches -- every import fails and
`pip install --upgrade` cannot repair them, taking down the API,
Controller, yt-dlp, and Help.
upgrade.sh now compares each venv's recorded Python version against the
current one and does a full rebuild via reset_virtual_environments.sh
when they differ. Detecting a mismatch (rather than literally "3.11")
also self-heals future bumps and is a no-op once versions match or on a
fresh install with no pyvenv.cfg yet.
reset_virtual_environments.sh gains a -y/--yes flag to skip its
confirmation prompt; the interactive yes_or_no read loops forever on EOF
under the tty-less wrolpi-upgrade.service.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
