fix(acceptance): 按隔离额度执行平台降级路由

让 acceptance 候选负载读取同一 Run ID 下的并发、RPM 和 TPM 计数器，并在单个平台模型额度不足时继续尝试下一候选，生产与 canary 额度作用域保持不变。\n\n补齐本地容量控制器对宁波和香港测试 Worker 的最小 RBAC，避免初次应用生产反亲和配置时发生滚动死锁，并将突发负载对齐到完整限流窗口。\n\n验证：\n- go test ./internal/runner ./internal/store -count=1\n- go vet ./internal/runner ./internal/store\n- bash -n scripts/acceptance/local-cluster.sh scripts/acceptance/provider-burst.sh scripts/acceptance/run-local-acceptance.sh\n- shellcheck -x scripts/acceptance/local-cluster.sh scripts/acceptance/provider-burst.sh scripts/acceptance/run-local-acceptance.sh\n- kubectl apply --dry-run=client -f deploy/kubernetes/local-acceptance/capacity-controller-rbac.yaml

scripts/acceptance/provider-burst.sh

@@ -543,6 +543,9 @@ provider_burst() {
   sample_resources "$resources" "$worker_sample_stop" &
   active_resource_sampler_pid=$!
   current_phase=provider_burst_load
+  while ((10#$(date -u '+%S') > 5)); do
+    sleep 1
+  done
   run_load video-provider-quota "$load_report" -requests "$requests"
   sleep 2
   touch "$worker_sample_stop"