Adds uv pip install openai mautrix[encryption] to the hermes container
entrypoint, with volume mount at /opt/hermes/.venv for persistence.
Key changes:
- Entrypoint now activates venv and installs Matrix bridge deps before
running the official entrypoint.sh
- Handles empty-volume first-boot by recreating the venv from scratch
(matching Dockerfile install steps)
- Persists venv at /mnt/HoardingCow_docker_data/Hermes/venv so pip
packages survive container recreation
