aibrix cant find correct router

### 🐛 Describe the bug

#### issue simple description
`1P(TP16)1D (TP16)` and `2P(TP=16)1D(TP=16)` is working normally, but `4P(TP8)1D(TP16)` failed, when i run the curl :
```
LB_IP=$(kubectl get svc/envoy-aibrix-system-aibrix-eg-903790dc -n envoy-gateway-system -o=jsonpath='{.status.loadBalancer.ingress[0].ip}')
ENDPOINT="${LB_IP}:80"

curl -v http://${ENDPOINT}/v1/models/

curl -v http://${ENDPOINT}/v1/chat/completions -H "routing-strategy: pd" -H "Content-Type: application/json" -d '{
"model": "DeepSeek-R1",
"messages": [
{"role": "system", "content": "You are a helpful assistant."},
{"role": "user", "content": "help me write a random generator in python"}
],
"temperature": 0.7,
"max_tokens": 10
}'
```
output is:
```
{"error":{"code":null,"message":"httproutes.gateway.networking.k8s.io \"DeepSeek-R1-router\" not found","param":null,"type":"api_error"}}
```
#### my yaml: `sglang-4P1D.yaml`
```
apiVersion: orchestration.aibrix.ai/v1alpha1
kind: StormService
metadata:
name: sglang-1p1d
spec:
replicas: 1
updateStrategy:
type: InPlaceUpdate
stateful: true
selector:
matchLabels:
app: sglang-1p1d
template:
metadata:
labels:
app: sglang-1p1d
spec:
roles:
- name: prefill
replicas: 4
podGroupSize: 1
stateful: true
template:
metadata:
labels:
model.aibrix.ai/name: DeepSeek-R1
model.aibrix.ai/port: "30000"
model.aibrix.ai/engine: sglang
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- pod1-gpu-027
- pod1-gpu-028
- pod1-gpu-029
- pod1-gpu-030
- pod1-gpu-031
- pod1-gpu-032
containers:
- name: prefill
image: 10.24.10.61:20405/sglang:v0.4.10-deepseek3.1-0822-my-re_mooncake
command: ["sh", "-c"]
args:
- |
python3 -m sglang.launch_server \
--model-path /llm/deepseek/DeepSeek-R1-0528-full \
--served-model-name DeepSeek-R1 \
--host 0.0.0.0 \
--port 30000 \
--mem-fraction-static 0.9 \
--tp-size 8
env:
- name: GLOO_SOCKET_IFNAME
value: eth0
- name: NCCL_SOCKET_IFNAME
value: eth0
- name: NCCL_IB_DISABLE
value: "0"
- name: NCCL_IB_GID_INDEX
value: "0"
- name: NCCL_DEBUG
value: "WARN"
- name: TORCH_CUDA_ARCH_LIST
value: "9.0"
volumeMounts:
- name: model-vol
mountPath: /llm
- mountPath: /dev/shm
name: shared-mem
resources:
limits:
nvidia.com/gpu: 8
securityContext:
allowPrivilegeEscalation: true
readOnlyRootFilesystem: false
runAsNonRoot: false
privileged: true
capabilities:
add:
- IPC_LOCK
volumes:
- name: model-vol
hostPath:
path: /llm
type: Directory
- emptyDir:
medium: Memory
name: shared-mem
- name: decode
replicas: 1
podGroupSize: 2
stateful: true
template:
metadata:
labels:
model.aibrix.ai/name: DeepSeek-R1
model.aibrix.ai/port: "30000"
model.aibrix.ai/engine: sglang
spec:
affinity:
nodeAffinity:
requiredDuringSchedulingIgnoredDuringExecution:
nodeSelectorTerms:
- matchExpressions:
- key: kubernetes.io/hostname
operator: In
values:
- pod1-gpu-027
- pod1-gpu-028
- pod1-gpu-029
- pod1-gpu-030
- pod1-gpu-031
- pod1-gpu-032
containers:
- name: decode
image: 10.24.10.61:20405/sglang:v0.4.10-deepseek3.1-0822-my-re_mooncake
command: ["sh", "-c"]
args:
- |
python3 -m sglang.launch_server \
--model-path /llm/deepseek/DeepSeek-R1-0528-full \
--served-model-name DeepSeek-R1 \
--host 0.0.0.0 \
--port 30000 \
--disaggregation-mode decode \
--disaggregation-transfer-backend=mooncake \
--trust-remote-code \
--disaggregation-ib-device mlx5_0,mlx5_1,mlx5_2,mlx5_3,mlx5_4,mlx5_5,mlx5_6,mlx5_9 \
--dist-init-addr "${PODSET_NAME}-0.${STORM_SERVICE_NAME}.default.svc.cluster.local:5000" \
--nnodes 2 \
--node-rank $POD_GROUP_INDEX \
--tp-size 16 \
--mem-fraction-static 0.8
env:
- name: GLOO_SOCKET_IFNAME
value: eth0
- name: NCCL_SOCKET_IFNAME
value: eth0
- name: NCCL_IB_DISABLE
value: "0"
- name: NCCL_IB_GID_INDEX
value: "0"
- name: NCCL_DEBUG
value: "WARN"
- name: TORCH_CUDA_ARCH_LIST
value: "9.0"
volumeMounts:
- name: model-vol
mountPath: /llm
- mountPath: /dev/shm
name: shared-mem
resources:
limits:
nvidia.com/gpu: 8
securityContext:
allowPrivilegeEscalation: true
readOnlyRootFilesystem: false
runAsNonRoot: false
privileged: true
capabilities:
add:
- IPC_LOCK
volumes:
- name: model-vol
hostPath:
path: /llm
type: Directory
- emptyDir:
medium: Memory
name: shared-mem
```

### Steps to Reproduce

1. `kubectl apply -f sglang-4P1D.yaml`
2. run the curl
```
LB_IP=$(kubectl get svc/envoy-aibrix-system-aibrix-eg-903790dc -n envoy-gateway-system -o=jsonpath='{.status.loadBalancer.ingress[0].ip}')
ENDPOINT="${LB_IP}:80"

curl -v http://${ENDPOINT}/v1/models/
curl -v http://10.24.8.71:80/v1/models/

curl -v http://${ENDPOINT}/v1/chat/completions -H "routing-strategy: pd" -H "Content-Type: application/json" -d '{
"model": "DeepSeek-R1",
"messages": [
{"role": "system", "content": "You are a helpful assistant."},
{"role": "user", "content": "help me write a random generator in python"}
],
"temperature": 0.7,
"max_tokens": 10
}'
```

### Expected behavior

get the normal output

### Environment

1. aibrix version is 2025/10/21 nightly
2. sglang version: 0.4.10

@Jeffwan