v0.5.1

Millrace 0.5.1 releases the current public package surface as millrace-ai==0.5.1.

Install:

python3 -m pip install millrace-ai==0.5.1

This release updates the public/operator docs with exact 0.5.1 install guidance, carries the packaged documentation copies forward in lockstep, refreshes the packaged asset manifest, and publishes the matching package build to PyPI.