test(multiplayer): isolate agones lifecycle smoke

scripts/verify_kind_agones.sh

@@ -63,7 +63,17 @@ kubectl wait --for=condition=available deployment/agones-allocator \
 # this isolated run only, replace that exact placeholder with the image loaded
 # into kind. No repository manifest is modified and no mutable image is used
 # outside the disposable cluster.
-sed "s|ghcr.io/cosmic-clash/game-server@sha256:$(printf '0%.0s' {1..64})|$game_server_image|" \
+#
+# This runner is intentionally an Agones lifecycle smoke, not a substitute for
+# the production control-plane gate: there is no PostgreSQL/API/roster backend
+# in this disposable cluster. Disable only those production-only child paths so
+# the real supervisor can validate the assigned endpoint, launch the exported
+# server, and call the Agones SDK Ready endpoint.
+zero_digest="$(printf '0%.0s' {1..64})"
+sed -e "s|ghcr.io/cosmic-clash/game-server@sha256:${zero_digest}|$game_server_image|" \
+    -e 's|--control-plane-url=http://control-plane.cosmic-clash.svc.cluster.local:8080|--control-plane-url=|' \
+    -e '/- --roster-path=\/run\/cosmic-clash\/join-roster.json/d' \
+    -e '/- --allocated-mode$/d' \
   deploy/k8s/base/fleet.yaml > "$work_dir/fleet.yaml"
 
 kubectl apply -f deploy/k8s/base/namespace.yaml