v2.4.0

What's Changed

• Release 2.4.0: harden qualitative Autoresearch loops by @TheGreenCedar in #150
• Simplify Autoresearch guidance, CLI contracts, and dashboard readouts by @TheGreenCedar in #151
• Promote dev to main for Autoresearch 2.4.0 by @TheGreenCedar in #152
• Fix source runtime rebuild freshness guard by @TheGreenCedar in #154
• Promote auto-release fix to main by @TheGreenCedar in #155

Full Changelog: v2.3.15...v2.4.0