v0.12.2

Rereleased from v0.12.1 due to mistakenly stating that uv was upgraded, not pip. Releases otherwise identical.

What's Changed

• Delete pytest files in clean_bygg_tree fixture by @rikardg in #376
• Reduce copying of files for pytest by @rikardg in #377
• Upgrade pip -> 25.3 to resolve CVE by @rikardg in #379

Full Changelog: v0.12.0...v0.12.2