feat(measurement): add dichotomous instrument policy contract

[seonghobae]

Scope

Adds the LineageWeave-owned dichotomous measurement-policy contract on top of #899. LineageWeave owns rubric/version/lifecycle/activation and observation-policy semantics only. Numerical IRT kernels remain in fast-mlsirm, temporal/event/multilevel measurement semantics remain in TEPP, and provider/judge execution remains in contextual-orchestrator.

The governed production family identifiers are exactly rasch, irt_2plm, irt_3plm, and irt_4plm; Rasch is not exposed as a generic 1PL alias. Missing/not-observable/abstain/invalid/adjudication-required states remain outside the 0/1 response channel. Published instruments require an explicit governed family plus activation-evidence reference; LineageWeave does not auto-select a family from domain labels or hand-authored mechanism flags.

TDD repairs

• enum-boundary RED 97a39d365e673fe1c2833ccd076db6eb68d42c1d → GREEN cca6d838e8c377070bec1c71b7aaec8f2762424f;
• string-field RED 636a8dfbe070a612a703e570a1a3342ac3fcea4b → GREEN b9ab660f3a5c371265401f4e3b6db1534a2d03f9;
• numeric transport-type RED 49a82aa18be438311c0c1f3abc7eaf151f073b93 → GREEN ec2ab254b85a9ed4bef50c1de8214bbc56e201bc, with bde68937a4f8b30a5a2b9f57475737ef568d489d aligning invalid-integer versus boolean transport assertions;
• canonical-text RED df0655750a9e66974d94ba8add6784f421977f2e → GREEN b6efdf9ee3ba2690c37e931e2c127cc8c221e491, rejecting surrounding whitespace in owned canonical identifiers/evidence references without normalizing opaque identity.

Adapters may parse external values, but unparsed or non-canonical transport values cannot silently become governed measurement policy.

Current stack / exact evidence

Parent #899 moved non-force to e5711282c48cc20d0a88fb56a9e382d500989c72 while adopting protected main@83eba56149eb802cd63642c507c324c9976ec78e Draft-admission workflow contracts. Review 5118120889 verified this PR's seven measurement-policy files are disjoint from those parent repairs. Two-parent convergence c316bfbde8644feda7e49579d43cc162e99b0bad preserves the measurement-policy tree, adopts the exact protected workflow/contract blobs, and joins the moved parent without force rewrite.

• exact parent/base: #899@e5711282c48cc20d0a88fb56a9e382d500989c72;
• exact current head: c316bfbde8644feda7e49579d43cc162e99b0bad;
• GitHub remains Draft/open/mechanically mergeable;
• exact-head Tests 33923071658 completed skipped under Draft admission; this is not product GREEN;
• predecessor checks/reviews do not transfer and no qualifying independent approval is claimed.

Keep Draft until the unchanged current head is eligible for its full repository/security/governance evidence and a qualifying independent review applies. No self-approval, bypass, force push, destructive rewrite, or invented owner contract.

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[seonghobae]

Exact-head audit found the original domain/boolean selector was a hand-authored model-selection heuristic. Commit 824425146 removes that selector and requires explicit intended-use evidence plus the owning psychometric runtime recovery contract.

Verified locally:

• pytest measurement + DDD fitness: 15 passed
• measurement module statement/branch coverage: 100% (70/70 statements, 24/24 branches)
• public docstrings: 2 passed
• Ruff 0.12.11: clean

This remains a draft stacked on #899; no protected-main or runtime-scoring claim.

[seonghobae]

A bounded child provenance implementation is now stacked on this exact measurement-policy head: #915 (feat/dynamic-evaluation-lineage-20260902). It projects immutable dynamic item/run snapshots, generation/rater/adjudication/calibration/promotion/supersession references, zero-anchor cold-start limitations, and evidence-gated linked comparability without importing provider configuration, psychometric arithmetic, hosted adjudication, or foreign databases. ADR 0352 was selected because ADR 0302 is already owned by the active leftover-map stack. Keep #915 Draft until #899/#902 and compatible released owner contracts are available; then restack without force-push and regenerate exact-head tests/security/review.

[seonghobae]

Parent #899 has moved non-force to e5711282… after adopting protected-main Draft-admission workflow contracts. This child’s seven measurement-policy files do not overlap those parent repairs, so retaining the old parent ancestry is now a wrong-base finding. Preserve the measurement-policy delta exactly, adopt the four parent workflow/contract blobs, and advance this branch with a two-parent non-force convergence commit. Do not transfer predecessor checks or approval.