fix(margin): Reference VNOM to what the rails run at, and split profiles per CONN

86 of the 144 margin channels moved up +0.8% .. +2.5% to the measured
median for this platform (3.3 -> 3.38, 0.9 -> 0.915, 0.8 -> 0.82, ...).

That is not a display change. VNOM is the denominator of margin_status'
deviation %, and it is also the basis margin_set derives high/low/OV/UV
from - so both the number you read and the voltage you apply move with
it. A rail steady at 0.756 V used to read +0.80% against a nominal 0.75
and now reads 0.00%. Margin logs from before and after cannot be
compared: the reference moved, the hardware did not.

comboA/comboB are replaced by combo_SWB_CONN13..16_{high,low}. The
per-channel percentages are positional, so they follow the rails of one
specific board - applying a CONN13 profile to a CONN16 margins the wrong
rails and nothing detects it. SWB0 and SWB1 share a profile per CONN
because their rails are identical.

Fixes two things the deletion broke:
  - margin_apply_profile_all.sh still named comboA for all nine boards,
    which would now stop at "Profile not found" nine times over. It names
    the matching per-CONN profile instead, with CB on the generic
    combo_high3, and a note that the low pass is _high -> _low.
  - docs/LTC2980_channel_map.csv is generated from settings/*.conf, so
    all 86 changed rails were stale in it. Regenerated.

The eight new profiles also still carried comboA's header comment
("alternating high/low"), which describes neither what they contain nor
what they are for.

Script A -> V1.1.3.

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

ARCHITECTURE.md

@@ -202,7 +202,9 @@ Blanton_TTL_Script/
                 ├── margin.sh              # margin_init/status/set/apply_profile/save
                 #                            #   v2.7.0：margin_save all / margin_save blanton
                 ├── settings/*.conf        # 一個 .conf = 一顆 LTC2980（CB + SWB0/1 × CONN13~16）
-                ├── profiles/*.conf        # 16-ch 批次組合（comboA/B、high3/5、low3/5、normal、off）
+                ├── profiles/*.conf        # 16-ch 批次組合。SWB 為 per-CONN：
+                #                            #   combo_SWB_CONN13~16_{high,low}（百分比對應該片的軌）
+                #                            #   通用：high3/5、low3/5、normal、all_off
                 ├── script/*_all.sh        # 跨 9 顆 LTC2980 的批次 status / apply / save
                 ├── Ref/margin_command_trace.md  # 指令追蹤參考（SWB 章節已標過期，見文件內警告）
                 └── logs/                  # margin 操作 log
@@ -243,11 +245,20 @@ Log 檔名規則：`<mdir>\Logs\<project_name>_<strTestcase>_<YYYYmmdd-HHMMSS>.l
 | `CB_I2C_CH` | int | `TRANSPORT="swb"` 時的 FPGA I2C 通道（6/7/8/9） |
 | `CHIPS[]` | string[2] | `"bus:addr"`，index 0 → CH0~7、index 1 → CH8~15 |
 | `CHIP_PRE_CMD[]` / `CHIP_POST_CMD[]` | string[1] | mux 切換等前後置指令，`;` 分隔多筆 |
-| `CH<n>_VNOM` | string | 標稱電壓（`"-"` = 未使用 / NC） |
+| `CH<n>_VNOM` | string | 這條軌的**基準電壓**（`"-"` = 未使用 / NC） |
 | `CH<n>_NET` | string | 電路 net name（對照 schematic） |
 
 Channel 定址：`ch / 8` → `CHIPS[]` index，`ch % 8` → LTC2977 PMBus PAGE（0x00~0x07）。
 
+**`VNOM` 自 2026-08-30 起是「Blanton 實測中位數」，不是規格標稱值。** 144 條軌裡有 86 條
+被改上去 +0.8% ~ +2.5%（例：`PVDD3_3V_SYNTH_LDO_*` 3.3 → 3.38、`P0V9_AVDD_*` 0.9 → 0.915、
+`PVDD0_8V_T3` 0.8 → 0.82）。這件事影響兩處，**不是只有顯示**：
+
+- `margin_status` 的偏差 % 是對 `VNOM` 算的 —— 以前一條穩定在 0.756 V 的軌顯示 `+0.80%`，
+  現在顯示 `0.00%`。**舊 log 的偏差 % 不能跟新 log 直接比。**
+- `margin_set` 的 high / low / OV / UV **全部由 `VNOM` 推算**（`VNOM × (1 ± change%)`），
+  所以整個 margin 視窗跟著平移。同樣下 `+3%`，實際打到的絕對電壓比以前高。
+
 **SWB 通道與位址對應（2026-08-19 上機驗證，`ababb2c`）：**
 
 | FPGA I2C 通道 | 板 / 接頭 | LTC2977 位址（lo / hi） |
@@ -353,7 +364,7 @@ PROFILE_CHANNELS=( "0:high:8" "1:low:8" ... )   # "channel:operation:change_perc
 | **ICB / PDB 存取** | `vi2c_init/scan/read/write`、`vi2c_scan_all` | CB F3 VI2C proxy，~3.3 ms/reg，取代 VSPI 的 ~18 ms/reg（後者會踩 SMBus 25–35 ms timeout） |
 | **溫度** | `temp_cb` / `temp_icb` / `temp_all` | TMP75（12-bit 左靠齊 ×0.0625）、TMP432（含 RANGE bit 的 −64 偏移、remote1/2） |
 | **電源資料** | `pwr_data` / `pwr_data_pdb` / `pwr_pdb_id` | SWB VRM 全軌 Vin/Vout/Iout/Temp 對齊表；MP29816 解析度**執行期從 `MFR_VOUT_SCALE_LOOP` 讀**，不寫死 |
-| **電壓 Margin** | `margin_init/status/set/apply_profile/save` + `*_all.sh` | 9 顆 LTC2980（CB CONN13、SWB0/1 CONN13~16）批次 high/low margin 與狀態掃描。v2.6.0 起 SWB 路徑真正接上共用 cb_i2c 後端，並有 `margin_swb_info/probe/scan/reset/sem` 除錯包裝 |
+| **電壓 Margin** | `margin_init/status/set/apply_profile/save` + `*_all.sh` | 9 顆 LTC2980（CB CONN13、SWB0/1 CONN13~16）批次 high/low margin 與狀態掃描。`VNOM` 為 Blanton 實測中位數（2026-08-30）；SWB 的 profile 是 per-CONN，套錯 CONN 會 margin 到錯的軌且不報錯。v2.6.0 起 SWB 路徑真正接上共用 cb_i2c 後端，並有 `margin_swb_info/probe/scan/reset/sem` 除錯包裝 |
 | **Margin 寫 NVM** | `margin_save` / `margin_save all` / `margin_save blanton` | ⚠️ 永久寫入。`0x15` 送 PMBus **send-byte**（不帶 data byte）。`all` = 依 `settings/` 走 9 顆、跑完還原原本載入的板子；`blanton` = 本平台捷徑，18 顆全走原生 i2c bus（`MARGIN_BLANTON_STORE` 表），不需 `margin_init`。每筆之間 `MARGIN_STORE_SETTLE`（0.5s），工具**不 poll busy bit** |
 | **管理網路 ping** | `mgmt_ping_monitor.sh {start\|stop\|status\|fg\|tail\|clear\|summary}` | 一輪 = 10G leg + 1G leg，各自 `ip address/route replace` 後 `ping -I <if>` 打自己的對端；兩張卡都保持 up。每 leg 記 `ip -s link show` 與該卡的 TX/RX packet delta，另出一行可 grep 的 `RESULT` |
 | **BMC 監控** | `bmc_monitor.sh {start\|stop\|status\|fg\|tail\|clear}` | 由 host 端 `bmc-manager run` 週期取樣 `free -m`，另加一組 **I2C 寫入/讀回圖樣測試**（bus 1、addr 0x41、offset 0x00C0，寫 `55AA55AA` 讀回、再寫 `AA55AA55` 讀回）。B 啟動、C 停止並 `cat log/bmc_poll.log` |