docs(r2-12): record R2-12 repo-hygiene execution + open follow-ups in STATUS.md

archreview/plans/STATUS.md

@@ -150,3 +150,17 @@ surface), 03/S2/S3 block-bridging, 03/P1 surgical adds (guard prerequisite in pl
 per-plan task counts, effort, and suggested execution order: [`00-INDEX.md`](00-INDEX.md) §"Round 2
 plans". 193 bite-sized TDD tasks total, ~18–24 dev-days end-to-end; R2-01/02/03 (the re-review's
 new-and-sharp items) are ~2 days combined.
+
+**Round-2 EXECUTED — R2-12 Repo hygiene (2026-07-13, branch `r2/12-repo-hygiene`):** DONE.
+07/U-5 (7 `lib/` AVEVA DLLs removed + gitignored, zero-reference proven), 07/U-4 (root planning
+files: `pending.md`/`current.md` untracked+gitignored, `looseends.md` deleted, `stillpending.md` +
+`HISTORIAN-GATEWAY-INTEGRATION-ISSUES.md` archived under `docs/plans/`, `docs/Historian.md`
+repointed), 07/S-3 (`v2-e2e.yml` no-op nightly deleted), 07/P-5 (redundant `integration` matrix job
+removed from `v2-ci.yml`), 07/U-3 (5 alarm operator CLI commands documented — now 13/13), 07/C-5
+(`StyleGuide.md` ScadaBridge→OtOpcUa + minimal root `.editorconfig`), 07/C-4 (xunit pin 2.9.2→2.9.3
++ blocker comment; upstream-blocked — no xunit.v3 Akka TestKit exists). 07/U-6 needed no action (the
+Wonderware husk dirs are untracked build artifacts, absent in a fresh worktree). Whole-solution build
+clean. **OPEN follow-ups:** (a) when a runner-reachable fleet + a real `tests/Server/…E2ETests` land,
+add a fresh E2E workflow WITH a zero-match guard (fail if `Category=E2E` matches nothing); (b) S-2
+option #2 — a fixture-backed integration leg (opc-plc `services:` block, `MIN_EXECUTED=1`) covering
+what the unit leg cannot; (c) migrate the 3 xunit v2 holdouts once Akka ships an xunit.v3 TestKit.