fix(taskctl): commitTask marks task done even when git commit reported nothing to commit

[randomm]

Problem

commitTask in pulse.ts marks the task as stage: done after the @ops session finishes, regardless of whether a commit was actually made. If git commit reports 'nothing to commit', the task is still closed as 'approved and committed' — silently losing all developer work.

Root Cause

commitTask (pulse.ts ~line 604) polls until the ops session is no longer actively running, then unconditionally marks the task done. It never reads the ops session output to verify a commit hash was produced.

Acceptance Criteria

• commitTask reads the @ops session output after completion
• If output contains 'nothing to commit', escalate as a commit failure (not mark done)
• Task is only marked done when a commit SHA is confirmed in the ops output
• bun test and bun run typecheck pass

[randomm]

Fixed in PR #280.