* feat(cli): add 'soup runs clean' intelligent checkpoint cleanup to reclaim disk space
* update README
* feat(cli): add 'soup runs clean' intelligent checkpoint cleanup to reclaim disk space
* fixed whitespace trails
* style(cli): fix lints (line length and spacing) in runs.py
* style: fix all E501 line length lint errors
* fix test mismatch, improve deletion warnings, add path validation, and enforce argument exclusivity
* fix: break long message into multiple lines for Ruff compliance
* test: update runs clean test to use CWD-based output directory for security compliance