refactor(docs): strip residual Phase/Plan setup-history references

Final sweep for setup-process bookkeeping not caught by template-reset-v1.
ADRs drop Plan-N qualifiers; spec collapses the historical 11-phase
migration table; scaffolding guide drops "Phase added" column; comment
prefixes referencing R-numbers in test describes / eslint inline comments
are normalized. Architecture-level rule IDs (R40, R52, E0, J0, etc.) are
preserved where they serve as stable cross-references in ADRs.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

docs/decisions/adr-011-tdd-foundation.md

@@ -33,7 +33,7 @@ mock/real drift.
    run against every implementation (Mock + Payload). Eliminates the
    class of bug where the mock and the real impl drift apart.
 
-5. **Tests in core-* packages and apps** — composition smoke tests
+5. **Tests in core-\* packages and apps** — composition smoke tests
    (appRouter, payloadConfig, bind-production, providers).
 
 6. **Storybook test-runner** — every story executed as a smoke test.
@@ -60,7 +60,7 @@ mock/real drift.
 
 - New package to maintain (small, mostly stable surface).
 - Coverage thresholds may fail builds initially; we add tests to cross
-  threshold as part of Plan 7.
+  threshold as features land.
 - Sequence shuffle may surface latent flakes; we fix as found.
 - Templates for new features now require writing tests first; this is
   by design.