fix(taskctl): commitTask uses explicit worktree path and verifies commit succeeded (#277, #278, #279)

[randomm]

Fixes #277, #278, #279

Changes

Bug 1 fix (pulse.ts ~line 586): Explicit worktree path in ops prompt

Changed ops prompt from 'Commit all changes in the current directory' to explicitly name the worktree path and instruct @ops to use it as workdir parameter for all bash commands. The bash tool uses Instance.directory (project root) as default cwd — session.directory is ignored. Making the path explicit forces @ops to pass workdir correctly.

Bug 2 fix (pulse.ts ~line 631): Verify commit succeeded before marking done

After @ops session completes, read final assistant message via MessageV2.stream() and check for:

• Commit hash (7-40 hex chars) → success
• 'nothing to commit' → escalate with error (developer changes not found in worktree)
• Neither found → escalate with unclear output error

Previously task was unconditionally marked stage:done even when git reported 'nothing to commit', silently losing all developer work.