chore: bump controller image to 3f20de7 (simplified networking)

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:53f400940fd6f1c53e7e647dbf1a93a948976783
+        image: 189176372795.dkr.ecr.us-east-2.amazonaws.com/sei/sei-k8s-controller:3f20de7c0460023a0bb90df15fa97987abbf921b
         name: manager
         env:
           - name: SEI_NODEPOOL_NAME