The pinned install succeeded — torch 2.5.1+cu124, parler_tts 0.2.2,
transformers 4.46.1 — and `import parler_tts` still failed, with the worker
reporting only

    parler-tts install did not yield an importable package

which names neither the package nor the reason. It now reports the import
error itself.

The reason pip left behind: parler-tts pulls in descript-audiotools, which
requires an unpinned torchaudio, and pip resolved 2.11.0 against torch 2.5.1.
torchaudio is pinned with torch now, in the file and in the inline pins — a
pair of versions that must match is not something to leave to a resolver.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014T3rZozi1Ehk96NG1WesgC