CI: reduce pre-test Windows setup latency

.github/workflows/ci.yml

@@ -384,13 +384,14 @@ jobs:
         uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4.4.0
         with:
           node-version: 22.x
-          check-latest: true
+          check-latest: false
 
       - name: Setup pnpm + cache store
         uses: ./.github/actions/setup-pnpm-store-cache
         with:
           pnpm-version: "10.23.0"
           cache-key-suffix: "node22"
+          use-restore-keys: "false"
 
       - name: Runtime versions
         run: |
@@ -424,6 +425,10 @@ jobs:
       - name: Run ${{ matrix.task }} (${{ matrix.runtime }})
         run: ${{ matrix.command }}
 
+      - name: Prune pnpm store (Windows cache hygiene)
+        if: always()
+        run: pnpm store prune || true
+
   # Consolidated macOS job: runs TS tests + Swift lint/build/test sequentially
   # on a single runner. GitHub limits macOS concurrent jobs to 5 per org;
   # running 4 separate jobs per PR (as before) starved the queue. One job