docs(phaseA): Passo 6 complete — build-ns7zip matrix + release PASS

lint, self-test, build-ns7zip (Win+Linux) and the release job
(Gitea release + asset upload via REST API, auto token) all green.
Phase A Gitea end-to-end validated.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

plans/PhaseA-user-checklist.md

@@ -218,7 +218,7 @@ Validazione di A4 lato runner reale.
 
 - [x] Aprire la UI Gitea, repo `local-ci-cd-system`, branch
       `feature/python-rewrite-and-linux-migration`.
-- [~] Triggerare manualmente i 3 workflow (Actions → Run workflow):
+- [x] Triggerare manualmente i 3 workflow (Actions → Run workflow):
   - [x] `lint.yml` → atteso PASS
   - [x] `self-test.yml` → PASS — validati **entrambi i transport**
         (in-guest clone default + host-side clone+zip) su Win e Linux:
@@ -232,8 +232,21 @@ Validazione di A4 lato runner reale.
 
     Note: artifact github-free (no upload-artifact; file raw su
     `F:\CI\Artifacts\<job>`); `use-git-clone`/`submodules` default ON.
-  - [ ] `build-ns7zip.yml` matrix Win+Linux → atteso PASS,
-        artifact pubblicato per entrambe le piattaforme.
+  - [x] `build-ns7zip.yml` matrix Win+Linux → PASS (target repo
+        `Simone/nsis-plugin-ns7zip`, in-guest clone, `--dist`):
+
+    | Job                | Esito                                   |
+    | ------------------ | --------------------------------------- |
+    | build (windows)    | SUCCESS — DLL in dist/, artifact host    |
+    | build (linux)      | SUCCESS — 8 vCPU/8 GB, wall ~121s        |
+    | release (tag push) | SUCCESS — release Gitea + 2 asset upload |
+
+    Note: `release` validato con tag throwaway `v0.0.0-phaseA-test`
+    (poi rimosso); usa il token Actions automatico (Default Token
+    Permissions = Permissive) + REST API Gitea, legge gli artifact
+    host-side (no download-artifact). Linux perf: vCPU-starvation a 4
+    vCPU risolta con guest-cpu=8 (≈ Windows VM ~120s); gap col Windows
+    nativo MSVC (~30s) è inerente MinGW, fuori scope CI.
 
 - [ ] Se uno fallisce: scaricare i log dell'esecuzione, aprire issue in
       `TODO.md` con sha del workflow run e output errore.