fix(ci): retry npm install in pipeline to handle registry propagation delay (#2462)

Dev Publish can succeed but Test & Verify fails immediately after because
npm's CDN hasn't propagated the new version yet. Adds a retry loop (6
attempts, 10s apart) so the install survives propagation latency.

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/pipeline.yml

@@ -81,8 +81,15 @@ jobs:
           registry-url: https://registry.npmjs.org
           cache: 'npm'
 
-      - name: Install gsd-pi@dev globally
-        run: npm install -g gsd-pi@dev
+      - name: Install gsd-pi@dev globally (with registry propagation retry)
+        run: |
+          for i in 1 2 3 4 5 6; do
+            npm install -g gsd-pi@dev && exit 0
+            echo "Attempt $i failed — waiting 10s for npm registry propagation..."
+            sleep 10
+          done
+          echo "Failed to install gsd-pi@dev after 6 attempts"
+          exit 1
 
       - name: Run smoke tests (against installed binary)
         run: |