ci: the correctness plant runs integration + conformance on every push — a release never waits on a second machine

.forgejo/workflows/ci.yml

@@ -27,6 +27,22 @@ jobs:
       - run: npm ci
       - run: npm run test:unit
 
+  # The correctness plant's full gate: integration + conformance run here on
+  # dedicated iron, on every push, so a release never depends on any other
+  # machine being up. Verdicts live in this run's log (never inferred).
+  integration:
+    name: Integration + conformance (Node 22)
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '22'
+          cache: npm
+      - run: npm ci
+      - run: npm run test:ci-integration
+      - run: npx vitest run tests/conformance
+
   bun:
     name: Bun (latest)
     runs-on: ubuntu-latest