Add root redirect to /ui for gateway.unitone.ai

When users visit gateway.unitone.ai/ they are now redirected to /ui
with a 302 redirect.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: surinderunitone

azure-config.yaml

@@ -12,6 +12,17 @@ binds:
     name: default
     protocol: HTTP
     routes:
+    # Root redirect to UI
+    - name: root-redirect
+      matches:
+      - path:
+          pathExact: /
+      policies:
+        requestRedirect:
+          path:
+            full: /ui
+          status: 302
+
     # UI Dashboard
     - name: ui-route
       matches: