feat(queue): 增加非文本模型分布式准入队列

使用 PostgreSQL 统一同步与异步非文本任务的并发准入、持久化等待和 Worker 容量分配，并将生产 API 与独立 Worker 角色拆分。

补充策略管理、共享契约、OpenAPI、Kubernetes 双节点 Worker 清单及跨节点验收脚本；未默认启用任何生产 queue_size 策略。

已在原基线完成 Go、前端、迁移、Shell、Kustomize 与长任务容量验收；合入最新主干后将重新执行发布门禁。

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

@@ -84,6 +84,16 @@ verify_site() {
   wait_for_url "$site Web" "http://$address:$web_port/" 'EasyAI AI Gateway'
 }
 
+rollout_worker_site() {
+  local site=$1
+  local api_image=$2
+  "${kubectl[@]}" set image "deployment/easyai-worker-$site" -n "$NAMESPACE" \
+    "worker=$api_image"
+  "${kubectl[@]}" rollout status "deployment/easyai-worker-$site" -n "$NAMESPACE" --timeout=300s
+  [[ $("${kubectl[@]}" get deployment "easyai-worker-$site" -n "$NAMESPACE" \
+    -o jsonpath='{.spec.template.spec.containers[?(@.name=="worker")].env[?(@.name=="AI_GATEWAY_PROCESS_ROLE")].value}') == worker ]]
+}
+
 rollout_site() {
   local site=$1
   local api_image=$2
@@ -236,11 +246,20 @@ activate_manifest() {
     run_migrator "$source_sha" "$api_image"
   fi
 
-  if ! rollout_site hongkong "$api_image" "$web_image" "$api_changed" "$web_changed" ||
-      ! rollout_site ningbo "$api_image" "$web_image" "$api_changed" "$web_changed" ||
-      ! wait_for_url 'public readiness' "$PUBLIC_BASE_URL/api/v1/readyz" '"ok":true'; then
+  if { [[ $api_changed != true ]] ||
+       { rollout_worker_site hongkong "$api_image" &&
+         rollout_worker_site ningbo "$api_image"; }; } &&
+     rollout_site hongkong "$api_image" "$web_image" "$api_changed" "$web_changed" &&
+     rollout_site ningbo "$api_image" "$web_image" "$api_changed" "$web_changed" &&
+     wait_for_url 'public readiness' "$PUBLIC_BASE_URL/api/v1/readyz" '"ok":true'; then
+    :
+  else
     if [[ -n $previous_api && -n $previous_web ]]; then
       echo '[cluster-release] restoring previous application images' >&2
+      if [[ $api_changed == true ]]; then
+        rollout_worker_site hongkong "$previous_api" || true
+        rollout_worker_site ningbo "$previous_api" || true
+      fi
       rollout_site hongkong "$previous_api" "$previous_web" "$api_changed" "$web_changed" || true
       rollout_site ningbo "$previous_api" "$previous_web" "$api_changed" "$web_changed" || true
     fi
@@ -266,6 +285,10 @@ case ${1:-} in
     node "$manifest_tool" validate "$2" >/dev/null
     api_image=$(manifest_get "$2" images.api)
     web_image=$(manifest_get "$2" images.web)
+    for site in ningbo hongkong; do
+      [[ $("${kubectl[@]}" get deployment "easyai-worker-$site" -n "$NAMESPACE" \
+        -o jsonpath='{.spec.template.spec.containers[?(@.name=="worker")].image}') == "$api_image" ]]
+    done
     [[ $("${kubectl[@]}" get deployment easyai-api-ningbo -n "$NAMESPACE" \
       -o jsonpath='{.spec.template.spec.containers[?(@.name=="api")].image}') == "$api_image" ]]
     [[ $("${kubectl[@]}" get deployment easyai-web-ningbo -n "$NAMESPACE" \