docs: ratify ADR-0207 — GSM8K comprehension/composition substrate
Consolidating ratification of the GSM8K design of record. Ratify the built
comprehension/derivation substrate, freeze the serving regex recognizer/
injector path to lexemes + refusal-only, pin Phase 5b execution to
WIRING -> COMPOSITION -> LEXICON.
- ADR-0207: new consolidating decision (Accepted, ratified 2026-06-03).
Supersedes ADR-0163 §Phase B-E + ADR-0136 regex sentence-template
prescriptions. Freeze + wrong=0 gates (22-case corpus + sealed 1,319).
- ADR-0164/0165/0174/0178/0179: -> Accepted (ratified by ADR-0207,
2026-06-03). 0164 keeps its implementation clause (Phase 1+2 shipped;
remainder per §5) so Accepted != fully built.
- composition_validation/v1: 20 -> 22 cases (2nd R4/R5 positives,
dataset-sourced golds), +contract invariants 6-7, +dataset-gold test.
Baseline 4/18/0; 47 passed.
- docs/analysis: extraction-richness audit (read-only) reconciling
ADR-0179 to the tree (EX-1/2/4/5/6 landed; EX-3 deferred).
Non-serving (evals/docs/tests only). train_sample 6/44/0 unchanged;
no-ref <N> times hazard stays refused. GB3b/0136 untouched.
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