docs(prds): seed binder-wrap-helper PRD (architecture candidate 1)

Materialises the output of the improve-codebase-architecture skill's
grilling loop on Candidate 1 (binder duplication), sub-shape (a)
(helper-inside-binder).

Captured decisions:
  - New wireUseCase helper at @repo/core-shared/conformance/
  - Composes the existing withSpan + withCapture (+ optional
    withAudit) wrappers; doesn't replace them
  - Per-feature binders shrink to decision content + N wireUseCase
    calls instead of N x ~12 lines of inline wrapping
  - All 5 features migrated (10 binder files, ~24 inline wrap sites)
  - Brand attachment stays in the existing wrappers
  - Generator template emits the new shape so future scaffolds
    don't regress

Sub-shape (b) (pre-wired factory exports) explicitly rejected in
favour of (a) — keeps the wrapping a binder concern, preserves
ADR-008's per-feature DI isolation.

Status: draft. Will not pass through pnpm work decompose until a
human reviewer flips status to approved. Expected to land as one
mid-sized epic with the helper + per-feature migrations as separate
stories.

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

docs/work/_state.json

@@ -1,5 +1,5 @@
 {
-  "updated_at": "2026-05-13T14:51:52.854Z",
+  "updated_at": "2026-05-13T15:40:39.086Z",
   "epics": {
     "template-reset-v1": {
       "status": "done",