fix(deploy): 冒烟就绪轮询判据 HTTP200+status=ok，替代固定 sleep（消除冷启动假告警）

- deploy.sh: 轮询块（0.5s 间隔 / 默认 30s 上限），超时明确报错 + exit 非 0；
  SMOKE_HEALTH_URL/SMOKE_READY_MAX 可覆盖供离线演练；带 >>> cma-readiness-poll 标记便于抽取复用
- .woodpecker/main.yml backend-deploy: 同样去掉固定 sleep 3，改就绪轮询
- 验收: 离线演练 A(冷启动6s成功)/B(空端口超时非0)/C(200+degraded不误判)
- task: t2-cma-deploy-readiness-poll-20260915

.woodpecker/main.yml

@@ -68,6 +68,7 @@ steps:
       - SSH_DEPLOY_KEY
     commands:
       - *ssh_setup
-      - ssh root@git.sxbh.ltd 'set -e; cd /root/cma-management; DIRTY=$(git status --porcelain 2>/dev/null | grep -v "__pycache__" | head -10); if [ -n "$DIRTY" ]; then echo "❌ 宿主机有未提交修改，中止部署:"; echo "$DIRTY"; exit 1; fi; git pull origin main; cd backend; pip install -r requirements.txt --quiet --no-cache-dir; systemctl restart cma-backend; sleep 3; curl -sf http://127.0.0.1:8010/health'
+      - |
+        ssh root@git.sxbh.ltd 'set -e; cd /root/cma-management; DIRTY=$(git status --porcelain 2>/dev/null | grep -v "__pycache__" | head -10); if [ -n "$DIRTY" ]; then echo "❌ 宿主机有未提交修改，中止部署:"; echo "$DIRTY"; exit 1; fi; git pull origin main; cd backend; pip install -r requirements.txt --quiet --no-cache-dir; systemctl restart cma-backend; SMOKE_READY_MAX="${SMOKE_READY_MAX:-30}"; READY_TRY=0; READY_OK=0; READY_BODY=/tmp/cma-ci-ready-body.json; while [ "$READY_TRY" -lt $(( SMOKE_READY_MAX * 2 )) ]; do CODE=$(curl -s -o "$READY_BODY" -w "%{http_code}" --max-time 2 http://127.0.0.1:8010/health || echo 000); if [ "$CODE" = "200" ] && grep -q "\"status\":\"ok\"" "$READY_BODY" 2>/dev/null; then READY_OK=1; break; fi; sleep 0.5; READY_TRY=$(( READY_TRY + 1 )); done; if [ "$READY_OK" != "1" ]; then echo "🚨 后端就绪超时 ${SMOKE_READY_MAX}s（未达 HTTP200 + status=ok）"; cat "$READY_BODY" 2>/dev/null; exit 1; fi; echo "✅ 后端就绪（轮询 ${READY_TRY} 次，上限 ${SMOKE_READY_MAX}s）"; cat "$READY_BODY"'
     when:
       - path: backend/**