Annotate the one existing bare "# type: ignore" in AsyncRunner.py
with arg-type and var-annotated codes to prepare for
mypy.ignore-without-code.
Signed-off-by: Jan Lindemann <jan@janware.com>
Assisted-by: unsloth/Qwen3.6-35B-A3B-GGUF:IQ4_NL and pi.dev 0.81.1