v0.9.15 Background Sips

What's Changed

• Enhanced processing backgrounding
• Better workspace directory handling
• test: make shell highlight assertion portable by @panDing19 in #858
• AATIF improvements
• fix: report environment edit write failures by @panDing19 in #863
• Keep the first message of an assistant-first delimited document by @chuenchen309 in #859

New Contributors

• @panDing19 made their first contribution in #858
• @chuenchen309 made their first contribution in #859

Full Changelog: v0.9.7...v0.9.15