cad-executelisted

<objective> Execute every plan in a phase with Cadence's guarantees: protected-branch guard before the first dispatch, one cad-executor per plan, one atomic conventional commit per task, deviations recorded, a slim SUMMARY.md at the end. Sequential by default - parallel worktree execution only when config opts in. </objective> <execution_context> @${CLAUDE_PLUGIN_ROOT}/cadence-core/workflows/execute.md </execution_context> <process> Execute end-to-end. </process>