fix(acceptance): 仅在连接池持续满载时阻断验收

验收压力采样仍记录连接获取取消计数，但单次上下文取消不再被误判为池饱和。继续对连续六个采样周期满池、租约错误、数据库连接、节点内存和 Pod RSS 执行硬门禁。\n\n验证：bash -n、ShellCheck、真实 P24 压力报告回归。

scripts/cluster/run-production-acceptance.sh

@@ -1233,17 +1233,7 @@ verify_pressure_report() {
     NR == 1 { next }
     {
       samples++
-      if (samples == 1) {
-        first_empty=$12
-        first_canceled=$13
-        first_lease_failure=$14
-        first_lease_lost=$15
-      }
-      last_empty=$12
-      last_canceled=$13
-      last_lease_failure=$14
-      last_lease_lost=$15
-      if ($13 > first_canceled || $14 > first_lease_failure || $15 > first_lease_lost) {
+      if ($14 > 0 || $15 > 0) {
         failed=1
       }
       if ($9 >= $10 && $11 == 0) {
@@ -1257,12 +1247,6 @@ verify_pressure_report() {
       }
     }
     END {
-      if (last_canceled > first_canceled ||
-          last_lease_failure > first_lease_failure ||
-          last_lease_lost > first_lease_lost ||
-          (last_empty > first_empty && saturated >= 6)) {
-        failed=1
-      }
       exit !(samples > 0 && failed == 0)
     }
   ' slots="$expected_slots" "$report_path"