fix(release): 兼容首次创建容量控制器

旧生产集群没有 capacity-controller，部署前精确快照此前对缺失 Deployment 直接报错，导致目标状态尚未应用就阻断发布。

快照现在允许目标 Deployment 不存在；失败恢复时，快照中原本不存在的资源会被删除，从而同时支持首次创建和精确回退。

验证：bash -n、ShellCheck、人工发布脚本测试、线上缺失控制器只读快照演练。

deploy/kubernetes/easyai-ai-gateway-cluster-release

@@ -291,6 +291,7 @@ snapshot_application_deployments() {
     easyai-api-ningbo easyai-api-hongkong \
     easyai-worker-ningbo easyai-worker-hongkong \
     easyai-capacity-controller easyai-web-ningbo easyai-web-hongkong \
+    --ignore-not-found=true \
     -o json |
     jq '
       del(.metadata)
@@ -310,14 +311,21 @@ snapshot_application_deployments() {
 
 restore_application_deployments() {
   local snapshot=$1
+  local deployment
   [[ -s $snapshot ]] || return 1
   "${kubectl[@]}" apply -f "$snapshot" >/dev/null
   for deployment in \
     easyai-api-ningbo easyai-api-hongkong \
     easyai-worker-ningbo easyai-worker-hongkong \
     easyai-capacity-controller easyai-web-ningbo easyai-web-hongkong; do
-    "${kubectl[@]}" rollout status "deployment/$deployment" \
-      -n "$NAMESPACE" --timeout=300s || true
+    if jq -e --arg name "$deployment" \
+      'any(.items[]; .metadata.name == $name)' "$snapshot" >/dev/null; then
+      "${kubectl[@]}" rollout status "deployment/$deployment" \
+        -n "$NAMESPACE" --timeout=300s || true
+    else
+      "${kubectl[@]}" delete deployment "$deployment" -n "$NAMESPACE" \
+        --ignore-not-found=true --wait=true >/dev/null || true
+    fi
   done
 }