v0.37.0

A second pass over the toolkit with test-driven development as the premise, closing what the
v0.36.0 rules declared but did not connect, and the areas they did not reach.

Added

• Transaction-scenario integration suite. generate-scalardb-code now emits one *IT per
  TX- entry — happy path, OCC conflict, blind write, 2PC failure and saga compensation where the
  design uses them, indeterminate commit — over an in-process SQLite-backed ScalarDB, with an
  integrationTest task (failOnNoMatchingTests), so stage 4 of the quality gate has a suite
  behind it instead of a permanent not-configured. samples/scalardb-transaction-tests/ is
  the reference shape.
• /architect:generate-acceptance-tests. Cucumber-JVM step definitions for the Gherkin
  scenarios in reports/07_test-specs/bdd-scenarios/ (RULE- / EX- tag bound), an api or
  application driver over the Fakes with a fixed Clock, @wip on scenarios whose item has not
  landed (excluded from pass/fail, counted), an acceptanceTest task and
  reports/07_test-specs/acceptance-test-coverage.md — the ATDD outer loop of
  rules/tdd-workflow.md §3 made executable. Twenty-first extension-tier skill (108 commands).
• Suite policies. rules/tdd-workflow.md §6: a runtime budget per layer (unit ≤ 60 s,
  contract ≤ 3 min, integration / acceptance / characterization ≤ 10 min — over budget is a
  major with the slowest ten named), tests per layer reported, a flaky-test quarantine
  (@Tag("flaky"), counted and aged, major after 14 days, automatic retry never enabled on a
  gate task) and ubiquitous-language test naming; the gate records all of it, and
  review-consistency's terminology dimension checks test and scenario names against the glossary.
• Tests in /scalardb:* and /product:generate-frontend. scaffold lays out src/test/
  (repository port + InMemory*Repository Fake, unit test, ScalarDbTestBackend, *IT) and the
  integrationTest task; build-app writes each operation's tests before its service code;
  review-code gains a Tests item (real engine, OCC / blind write, testable without a database,
  weakened tests). generate-frontend emits Vitest + Testing Library tests over composed stories,
  page routing tests, a Playwright story-flow smoke and vitest.config.ts thresholds.

Changed

• review-issue reproduces before fixing. Every behavioural blocker gets a
  test: reproduce <blocker> commit shown failing before its fix: commit; non-behavioural
  blockers say why they skipped it.
• export-backlog emits the walking skeleton. One walking-skeleton Issue per new service,
  first in its Sub-Epic, cited by every sibling as its prerequisite.
• Characterization gate connected. implement-backlog records the characterizationTest
  baseline before a transformation-step item starts (red baseline → stop and generate the net);
  stage 4 of the gate and verify-implementation run it after, and a fixture edited in between is
  a decision on the Issue.
• docs/ddd-coverage(.ja).md. The three remaining △/× TDD rows are ◎; rows added for the
  integration suite, reproduce-first fixes and frontend tests.