fix(official-bots): mount JWT public key from ncs-jwt-keys (#413)

The official-bots rollout never mounted the ncs-jwt-keys secret nor set
JWT_PUBLIC_KEY_PATH, so the service fell back to the image-baked
public.pem, which does not match the deployed signing key. Every token
failed RS256 verification -> 401.

Mount ncs-jwt-keys at /secrets/jwt and point JWT_PUBLIC_KEY_PATH there,
mirroring account/core/tournament. Verify-only, no private key.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Reviewed-on: #413

nowchess/base/nowchess-rollouts.yaml

@@ -441,6 +441,12 @@ spec:
                   key: INTERNAL_SECRET
             - name: ACCOUNT_SERVICE_URL
               value: http://nowchess-account:8083
+            - name: JWT_PUBLIC_KEY_PATH
+              value: /secrets/jwt/public.pem
+          volumeMounts:
+            - name: jwt-keys
+              mountPath: /secrets/jwt
+              readOnly: true
           ports:
             - containerPort: 8088
               protocol: TCP
@@ -463,6 +469,10 @@ spec:
             limits:
               cpu: "500m"
               memory: "256Mi"
+      volumes:
+        - name: jwt-keys
+          secret:
+            secretName: ncs-jwt-keys
   rollbackWindow:
     revisions: 3
   strategy: