Briar v1.2.90

What's Changed

• docs: publish v1.2.89 changelog by @siisee11 in #778
• Remove workflow v1 compatibility by @siisee11 in #779
• fix(worker): route agent task claims before assets by @siisee11 in #780
• fix(worker): match agent task claim routes exactly by @siisee11 in #781
• fix: correct Kanban source and worker badges by @siisee11 in #782
• fix(mobile): iOS 스레드 답글 전송 오류 수정 by @siisee11 in #783
• Keep active issue runs alive across agent turns by @siisee11 in #784
• chore: release v1.2.90 by @siisee11 in #785

Full Changelog: v1.2.89...v1.2.90