Release packaging walked a working tree that still carried .NET build
output, Playwright run artifacts, and one-off browser automation scripts.
Those files are not source, could not be reproduced from the commit, and
made a clean-tree release gate impossible.
Build output and test run directories are now ignored and untracked, and
developer-only automation/scratch material moved under a single ignored
`scripts/local/` directory. A stale admin bundle that no HTML referenced
was dropped from the API server web root.
