fix(#4628): expose DAG-ready plans and restrict dispatch to them (#4781)

Emitted-Drift-Ack-Growth: execute-phase.md — #4628 consumer wiring: ready_plans parse pointer, not-ready named skip, and waiting condition 2b reference to the ready-wave-gate step file

Co-authored-by: sim <sim@local>

.changeset/nimble-pumas-roar.md

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+---
+type: Fixed
+pr: 4781
+---
+**phase-plan-index now exposes DAG-ready plans** — `ready_plans` (and per-plan `ready`/`unresolved_dependencies`) distinguish plans whose dependencies all have completion evidence from those merely unblocked by a halt; /gsd-execute-phase dispatches only ready plans and reports what it is waiting on instead of skipping incomplete predecessors. (#4628)

.changeset/zesty-wolves-tumble.md

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----
-type: Fixed
-pr: 4768
----
-**`/gsd-execute-phase`, `/gsd-autonomous --from|--to|--only`, `/gsd-plan-review-convergence` and the TDD plan path now handle letter-variant phase ids (`12A`, `3A`, `23A.1.2`)** — seven shell sites outside #4660's six still assumed a phase number was digits-and-dots: the post-#4619 `$((10#$PHASE_INT))` split aborted bash on `03A`, the review-file lookup's `printf "%02d"` printed the wrong file (and read an already-padded `08` as octal), and the `--from`/`--to`/`--only` and plan-review-convergence extractions silently truncated `12A` to `12` (and `23.1.2` to `23.1`). The split now stops at the first non-digit, `init execute-phase` emits `padded_phase` for the lookup, the extractions use the canonical grammar, the legacy normalizer pads a letter id, a parity test drives every site's live shell against a letter-suffixed fixture, and `lint-phase-id-drift` gains three ratchets so none of the shapes can return silently. (#4748)