Why: turn the confirmed scheduling specification into sequenced work with explicit interfaces, evidence handling and admission validation.
Evidence: SELF plan checks verified fixed source commits, 83 relative links, six units and four Python example blocks; implementation and runtime checks remain NOT_RUN.
Impact: reviewable implementation plan and navigation only; no task scripts, workflow, platform settings or business behavior are implemented.
Refs: docs/proposals/2026-10-13-merge-queue-implementation-plan.md; Dev policy/merge-queue.md r1; Development-Guidelines draft.11