Remove the conditional retry logic and always run the venv creation, pip install of calibreweb, and uv sync without build isolation. Updated ct/calibre-web.sh and install/calibre-web-install.sh to: run `$STD uv venv`, `$STD uv pip install --python /opt/calibre-web/.venv/bin/python --no-cache-dir calibreweb`, then `$STD uv sync --no-dev --no-build-isolation`. This simplifies the dependency installation flow and ensures the virtualenv and package are installed before syncing.
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