Task: Write sprint 24 release notes

Generate sprint 24's release notes document from merged PR data and closed tasks' Result sections, and capture illustrative screenshots for it through a real QA test scenario rather than ad hoc captures.

• Release notes are scaffolded via compass add release_notes into the sprint folder and populated from the collected PR data and closed tasks' * Result sections.
• The release notes are linked from the sprint's Status table and * Release Notes section.
• A QA test scenario captures screenshots illustrating the sprint's key shipped features, referenced from the release notes.

(Implementation strategy. Written when work starts; key decisions are distilled into the parent story's * Decisions at close, but the plan itself stays — it is the historical record of what we did.)

Manual QA scenarios (scaffolded via compass add test_scenario, run through the QA Validation Runner panel) that verify this task. Link new ones here as they're created; the scenario doc itself links back via its "Verifies task" field.