Wave-2 right-sizing: mas-mx CPU request 20m->5m (MAS-WP-0015)

Request only; memory 64Mi and 256Mi limit unchanged, no CPU limit added.
Evidence: resource-control 2026-10-21 node budget (3d9b1bd).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Assistant: claude-code
Assistant-Model: opus
Assistant-Process: 276069@bnt-lap001
Assistant-Session: 2e192b3d-b3e8-4403-94d4-d55a2c8b476c

deploy/railiance/manifests.yaml

@@ -90,7 +90,7 @@ spec:
             - {name: relay, mountPath: /etc/mas-relay, readOnly: true}
           readinessProbe: {tcpSocket: {port: 25}, periodSeconds: 10}
           resources:
-            requests: {cpu: 20m, memory: 64Mi}
+            requests: {cpu: 5m, memory: 64Mi}
             limits: {memory: 256Mi}
       volumes:
         - name: evidence