phase-task-verification

Invoked by sequential-phase-task and parallel-phase-task after task implementation to create and verify git-spice branch.

MODE: parallel - Detach HEAD (makes branch accessible in parent repo):

| "Verification is optional" | Silent failures lose work | | "Skip detach in parallel mode" | Breaks worktree cleanup | | "Branch create errors are obvious" | Silent failures aren't detected until cleanup fails | | "Detach can happen later" | Cleanup runs in parent repo - branch must be accessible |

منطق إنشاء الفرع المشترك والتحقق لتنفيذ المهام المتسلسلة والمتوازية - يعالج عمليات git والتحقق من HEAD والسلوك الخاص بالوضع المصدر: arittr/spectacular.