chore: bump controller image to 53f4009 (public DNS dual hostnames)

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

Author: bdchatham

config/manager/manager.yaml

@@ -32,7 +32,7 @@ spec:
           - --metrics-bind-address=:8080
           - --leader-elect
           - --health-probe-bind-address=:8081
-        image: 189176372795.dkr.ecr.us-east-2.amazonaws.com/sei/sei-k8s-controller:9f4b7b558bd6a9c5efd8dd05f9b56024a5565d0b
+        image: 189176372795.dkr.ecr.us-east-2.amazonaws.com/sei/sei-k8s-controller:53f400940fd6f1c53e7e647dbf1a93a948976783
         name: manager
         env:
           - name: SEI_NODEPOOL_NAME