Instrument worktree init, setup script, workflow steps, verification
commands, and in-merge fix retries with [timing] log entries so task
duration bottlenecks are visible in task logs. Also warn when
inferDefaultTestCommand falls back to `pnpm test` inside a pnpm
workspace — users should set an explicit scoped testCommand to avoid
running the whole monorepo suite on every merge.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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