docs(adr): ADR-013 input/output unification + Plan 9 changelog summary

Records the Plan 9 architectural decision (schemas in use-case file,
runtime output validation, presenter pattern, feature-scoped error
middleware, ./ui subpath split). ADR-012 gets a one-line cross-
reference to the new ADR. Refactor log gets a Summary section with
commit table and conformance checklist.

Plan 9 complete. The deferred doc-update pass (CLAUDE.md / AGENTS.md /
guides) — combined with the still-pending Plan 8 items — is the next
follow-up.

Refactor log: Summary, doc-update checklist
Spec: R29, R30

docs/decisions/adr-012-lazar-conformance.md

@@ -168,3 +168,13 @@ See refactor log for full file-by-file inventory.
 - Refactor log: `docs/superpowers/refactor-logs/2026-05-05-lazar-pattern-conformance.md`
 - Reference repo: https://github.com/nikolovlazar/nextjs-clean-architecture
 - Prior ADRs: ADR-006 (vertical-feature-packages), ADR-008 (per-feature DI containers), ADR-011 (TDD foundation)
+
+## Update — 2026-05-06
+
+Plan 9 (ADR-013) further unifies the input/output schema story:
+schemas now live in the use-case file (a refinement of §What we
+adopted #1's "factory-function use cases"); controllers gain a
+co-located `function presenter` (extending §What we adopted #4's
+"one-controller-per-use-case"); domain error → `TRPCError`
+translation runs through a per-feature middleware factory (a new
+concern not in this ADR). See `docs/decisions/adr-013-input-output-unification.md`.