feat(nfc): Poll the NFC tag through the soak instead of sampling it once

nfc_polling.sh wraps blantons_nfc_validate.py in a background loop and
keeps score: start/stop/status/tail/report/clear/fg. Script A takes a
30s baseline, Script B starts the poll for the soak, Script C stops it
with the other monitors and reports.

report only reads the log, so it can be run mid-soak without disturbing
anything - and it says RUNNING so a snapshot is not read as the final
answer. Each round appends a machine-readable RESULT line, which keeps
the tally independent of the tool's wording.

ERROR is counted apart from FAIL. A round where the tool printed neither
[PASS] nor [FAIL] - crashed, missing, hung past the timeout - measured
nothing, and that is a different fault from a tag that would not read.
Rolling them together hides whichever one you are not looking for.

Two habits from earlier bugs are baked in: tail does not follow (tail -f
never returns and a macro waiting on the prompt hangs there), and the .py
is called through python3 rather than ./ (it arrives mode 100644 and a
USB copy carries no execute bit).

Also fixes Script C copying "nfc_polling.log" to the job dir when the
file is "nfc_poll.log". The cp failed, nothing checked it, and the run
finished looking fine - you would find out at the desk, with a job
archive that had no NFC log in it.

Script A -> V1.1.2.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_014RetWKFZFG1ZHcitQAyhwM

ARCHITECTURE.md

@@ -188,6 +188,8 @@ Blanton_TTL_Script/
             │                              #   eth0→TARGET_10G、eth1→TARGET_1G，兩張卡同時持續 ping
             ├── port_prbs_monitor.sh       # 100G uplink PRBS 測試（bcmcmd phy diag）
             ├── blanton_ber.sh             # 全機 SerDes BER 掃描（phydiag prbs / prbsstat）
+            ├── nfc_polling.sh             # NFC tag 背景輪詢 + PASS/FAIL 統計
+            ├── blantons_nfc_validate.py   # NFC/NCI 驗證工具（廠商提供，未修改）
             ├── blanton_tr518.sh           # TR518 封包測試，量功耗前的負載來源
             ├── TH6_SWB0_power_readback.sh # SWB0 19 條軌 V×I + 總功耗
             ├── TH6_SWB1_power_readback.sh # SWB1 同上
@@ -342,9 +344,9 @@ PROFILE_CHANNELS=( "0:high:8" "1:low:8" ... )   # "channel:operation:change_perc
 
 | 模組 | 進入點 | 功能 |
 |------|--------|------|
-| **Script A（Pre-test）** | `1_Blanton_Script_A.ttl` V1.1.1 | root 登入 → `date -s` 對時 → 清 job log → **收掉前一輪殘留**（`hw-test-session finish` → `bgctl reset --yes` → `bgctl stop --all` → `bgctl list` 確認清空）→ `hw-test-session start` → **設定風扇轉速** → **等資料面就緒**（`wait_init.ttl`）→ DUT 清單（boot/version/fwutil/syseeprom/ssdhealth/TPM/NVMe）→ BMC enroll + version/status → source bash 工具 → 清/讀 7 組 PCIe AER + `ras-mc-ctl --summary` → `lspci` → margin → PMON → dmesg → **10G/1G 管理網路 ping** → 100G uplink 設定與狀態 → **一輪流量基線** → `show uptime` |
-| **Script B（Stress）** | `2_Blanton_Script_B.ttl` | `mlucas-avx2 -cpu 0:15` + `bgctl run` 的 `memtester` / SSD / USB 壓力 + BMC DDR（`bmc-manager run memtester`）→ BMC USB net test（探測 cdc_ncm 介面，`systemd-run` 掛 4 小時 ping）→ 啟動 mgmt ping 監控 → `jobs` / `bgctl list` → traffic（依 `SWB_UNIT`）→ `while 1` 每輪完整 PMON + margin |
-| **Script C（Post-test）** | `3_Blanton_Script_C.ttl` | `kill $(jobs -p)` + `bgctl stop --all` / `reset` + 停 BMC USB unit 與 mgmt ping → PMON + dmesg → 7 組 AER + `ras-mc-ctl` → BMC USB `journalctl` → `ip -s link show eth0/eth1` → `cat` mlucas log → traffic `stop` + `report` → **BER 掃描**（依 `SWB_UNIT`）→ NVMe 健康 → `show reboot-cause` / `uptime` → **job log 複製到 USB（帶時戳）** → `hw-test-session finish` |
+| **Script A（Pre-test）** | `1_Blanton_Script_A.ttl` V1.1.2 | root 登入 → `date -s` 對時 → 清 job log → **收掉前一輪殘留**（`hw-test-session finish` → `bgctl reset --yes` → `bgctl stop --all` → `bgctl list` 確認清空）→ `hw-test-session start` → **設定風扇轉速** → **等資料面就緒**（`wait_init.ttl`）→ DUT 清單（boot/version/fwutil/syseeprom/ssdhealth/TPM/NVMe）→ BMC enroll + version/status → source bash 工具 → 清/讀 7 組 PCIe AER + `ras-mc-ctl --summary` → `lspci` → margin → PMON → dmesg → **10G/1G 管理網路 ping** → **NFC 基線**（start → 30s → stop → report）→ 100G uplink 設定與狀態 → **一輪流量基線** → `show uptime` |
+| **Script B（Stress）** | `2_Blanton_Script_B.ttl` | `mlucas-avx2 -cpu 0:15` + `bgctl run` 的 `memtester` / SSD / USB 壓力 + BMC DDR（`bmc-manager run memtester`）→ BMC USB net test（探測 cdc_ncm 介面，`systemd-run` 掛 4 小時 ping）→ 啟動 mgmt ping 監控 → **啟動 NFC 輪詢** → `jobs` / `bgctl list` → traffic（依 `SWB_UNIT`）→ `while 1` 每輪完整 PMON + margin |
+| **Script C（Post-test）** | `3_Blanton_Script_C.ttl` | `kill $(jobs -p)` + `bgctl stop --all` / `reset` + 停 BMC USB unit、mgmt ping 與 **NFC 輪詢** → PMON + dmesg → 7 組 AER + `ras-mc-ctl` → BMC USB `journalctl` → `ip -s link show eth0/eth1` → `cat` mlucas log → **NFC `report`** → traffic `stop` + `report` → **BER 掃描**（依 `SWB_UNIT`）→ NVMe 健康 → `show reboot-cause` / `uptime` → **job log 複製到 USB（帶時戳）** → `hw-test-session finish` |
 | **SWB loopback 流量** | `blanton_traffic_linespeed <sub> [-u 0\|1\|all]` | `init`（VLAN 30..137，成對 `cdN`/`cdN+32`）→ `clear` → `start`（`tx 100 length=512`）→ `stop` → `report`（per-pair TX/RX 交叉比對 PASS/FAIL）；另有 `ps`（link/speed）與 `run`（一條龍）。**V0.6.0 起含 100G uplink `ce0`**（VLAN 138）：它沒有 loopback 對象，靠 **ingress mirror 打回自己**維持循環，`report` 最後一列就是它，底下再接一份跨 unit summary |
 | **FPGA 暫存器存取** | `cb_fpga <fn> <addr> [data]`、`fpga_rescan` | pcimem 打 `resource0` + BAR 相對 offset，32-bit word；BDF 於 source 時自動偵測；`pmc/icb/swb0/swb1_fpga` 走 VSPI 窗口 |
 | **CB I2C / PMBus** | `cb_i2c_init/scan/read/write`、`cb_pmbus_read/write/linear16` | FPGA F3 OpenCores master，**讀用 Repeated START**（SMBus/PMBus 裝置必需） |
@@ -360,6 +362,7 @@ PROFILE_CHANNELS=( "0:high:8" "1:low:8" ... )   # "channel:operation:change_perc
 | **SerDes BER 掃描** | `blanton_ber.sh {init\|clear\|start\|stop\|report} [-u 0\|1\|all]` | 全機每個對接 port 的 PRBS BER：`prbs set p=3` + `prbs get`（確認每條 lane 都鎖上）→ `prbsstat STArt Interval=30` →（等一個 interval）→ `prbsstat Ber` → `STOp` → `prbs clear`。`report` 一列一條 lane，**BER < 1e-6 才 PASS**，最後跨 unit 的 summary 帶最差 lane。⚠️ PRBS 期間 link 顯示 DOWN、不過流量 |
 | **TR518 負載** | `blanton_tr518.sh {start\|stop} [-u 0\|1\|all]` | `port cd lb=mac` → `l2 learn off` → `test mode nr=yes` → `tr 518 ... testphase=1`，然後 settle `TR_SETTLE_SEC`（120s）再讓人量功耗。`stop` 只送 `port cd lb=none`（照 `TR518.txt`），L2 學習與 test mode **不會還原**，`TR_RESTORE_*=1` 才會 |
 | **SWB 軌功耗** | `TH6_SWB{0,1}_power_readback.sh` | 讀 `show platform voltage/current` **各一次**，19 條軌 V×I 與總功耗。舊版每軌各讀一次（38 次呼叫、每軌不同時刻），總和是不同瞬間的加總 |
+| **NFC 讀取輪詢** | `nfc_polling.sh {start\|stop\|status\|tail\|report\|clear\|fg}` | 背景重複跑 `blantons_nfc_validate.py`，每輪追加一行機器可讀的 `RESULT=`（PASS/FAIL 取自工具自己的摘要行，兩者皆無則 **ERROR**，與 FAIL 分開計數）。`start` 會先清空 log；`report` **只讀 log，polling 中隨時可跑**，並標示 `RUNNING` 免得快照被當最終結果。`tail` **不 follow** |
 | **USB 目標偵測** | `usb_target.sh [-o dev\|mnt\|both\|id] [-n] [-r sec]` | 找出插入的 USB 儲存裝置，排除 `/` 與 `/host` 的底層碟（本平台可能從 USB DOM 開機），多顆時拒絕猜；掛載時會驗證真的可寫 |
 | **打包交付** | `publish/publish.sh [-v Ver] [-f] [-z] [-n]` | 版號讀 Script A 檔頭，複製成 `publish/Script_ABC_Blanton_<Ver>/`，排除 `*.log`，可另出 zip |