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CD Pipeline / deploy (push) Successful in 2m29s
P34/P36 都沒打到的 root cause：
ETAG=$(echo "$HDR" | grep -i '^etag:' | ...)
當 grep 找不到匹配 (mo.wooo.work /health 不帶 etag header)，
grep exit 1 → bash pipefail → 變數賦值整行 exit 1 →
set -e 殺掉整個 script → run 280/281 同樣位置死。
修：每個 grep pipeline 結尾補 `|| true` 兜底，empty result 不殺 script。
本機 bash -eo pipefail 模擬實 prod /health response：
ETAG=[] CLEN=[64] XPT=[]
FLASK_OK=1 (CLEN=64 != 7480 觸發 PASS)
✅ 預期下個 CD run 該 step 綠
