fix: node 24.9 internal issue

.github/workflows/ci.yml

@@ -252,6 +252,13 @@ jobs:
             name: node 22.19
             runner: ubuntu-latest
             gate_concurrency: '1'
+          # Pinned inside 24.0-24.11.1: those releases carry the v1 internal
+          # loader while reporting major 24, and every other job tracks the
+          # latest 24, which is v2. A bare `24` here would retest that same v2.
+          - node: '24.9'
+            name: node 24.9
+            runner: ubuntu-latest
+            gate_concurrency: '1'
           - node: 26
             name: node 26
             runner: ubuntu-latest
@@ -276,6 +283,12 @@ jobs:
           DSH_BUILD_CLIENT_PROFILE: official
         run: pnpm run check:node-compat
 
+      # Kept out of the gate aggregate: the shape a Node release carries only
+      # changes with the Node version, so this belongs to the version matrix
+      # rather than to every commit's checks.
+      - name: Check Loader internal shape detection
+        run: pnpm exec vitest run packages/boot/app-boot/tests/loader-shape.compat.spec.ts
+
   python-sdk:
     if: github.event_name == 'pull_request'
     runs-on: ubuntu-latest