azure-ai-voicelive needs linting updates for pylint version 4.0.4

**ACTION NEEDED:** This version of pylint will be merged on **2026-04-13**. The build will begin to fail for this library if errors are not fixed.

**Library name:** azure-ai-voicelive
**Pylint version:** 4.0.4
**Pylint Build:** [Link to build (2026-02-14)](https://dev.azure.com/azure-sdk/internal/_build/results?buildId=5883207&view=logs&j=e5b925a9-9650-5321-24fd-5d9499fe02b8&t=b33d1587-3539-5735-af43-e3e62f02ca4b)
**How to fix:** Run the `next-pylint` tox command at the library package-level and resolve the linting errors.
1) `../azure-ai-voicelive>pip install "tox<5"`
2) `../azure-ai-voicelive>tox run -e next-pylint -c ../../../eng/tox/tox.ini --root .`

See the [Pylint Guide](https://github.com/Azure/azure-sdk-for-python/blob/main/doc/dev/pylint_checking.md) for more information.