chore(台账): 恒剥修正让 Code 少 4 B，机器回填内存台账与同码凭证（#73）

剥头判据简化（去掉一次形态判断与一次比较）之后，产品构型 `Code` 从 249,124 变到
249,120，`ER_IROM1` 278,960 → 278,956、ROM 合计 281,012 → 281,008；`RW` / `ZI`
一字未动。台账里那些数字是受管区，按仓库约定不手改：

- `python scripts/check_mem_numbers.py --write` 回填 `docs/内存管理/RAM使用分析与优化方案.md`，
  `--scan` 复跑 exit 0；
- `python scripts/ram_baseline.py --write` 回填 `docs/内存管理/RAM预算台账.md`，
  `--gate` 现在 **PASS：RW_IRAM1 72.2 % / RW_CCM 87.9 %（阈值 92 %）**；
- `python scripts/ram_baseline.py --update` 追加 2026-11-04 趋势行，并写出本轮
  体积同码凭证 `scripts/size_attestation.json`（索引指纹 2f112c1679d6…，1468 个文件）。

scripts/size_attestation.json

@@ -1,25 +1,25 @@
 {
-  "built_at": "2026-11-02T22:19:57+08:00",
-  "fingerprint": "19f80087a70f1c74afb1d71fb6d754b4b647321da90b312068144a8f31a9a935",
-  "fingerprint_files": 1466,
+  "built_at": "2026-11-04T09:25:23+08:00",
+  "fingerprint": "2f112c1679d6145a49f70f6f208ade9a1e4fa573aad3cacdaa98b0ed2aac6855",
+  "fingerprint_files": 1468,
   "fingerprint_source": "git-index",
   "gated_regions": [
     "RW_IRAM1",
     "RW_CCM"
   ],
-  "git_head": "b8e1de5f2e2515b528b0af21bcb8b423a406b8f2",
+  "git_head": "f10bb8df659e201efbacf04978c7442493fe94df",
   "map": "MDK-ARM/STM32F407-Demo/STM32F407-Demo.map",
-  "map_mtime": 1793629184,
+  "map_mtime": 1793753528,
   "pct": {
-    "ER_IROM1": 26.45,
+    "ER_IROM1": 26.6,
     "RW_CCM": 87.89,
-    "RW_IRAM1": 72.0,
+    "RW_IRAM1": 72.19,
     "UNINIT_CCM": 18.75
   },
   "regions": {
     "ER_IROM1": {
       "max": 1048576,
-      "size": 277384
+      "size": 278956
     },
     "RW_CCM": {
       "max": 65280,
@@ -27,7 +27,7 @@
     },
     "RW_IRAM1": {
       "max": 131072,
-      "size": 94368
+      "size": 94624
     },
     "UNINIT_CCM": {
       "max": 256,
@@ -37,10 +37,10 @@
   "schema": 2,
   "scope_note": "\u540c\u7801\u51ed\u8bc1\uff1a\u6307\u7eb9\u8986\u76d6\u56fa\u4ef6\u4f53\u79ef\u76f8\u5173\u6e90\u7801\uff0c\u53e3\u5f84\u89c1\u672c\u811a\u672c docstring",
   "sizes": {
-    "code": 247548,
+    "code": 249120,
     "ro_data": 29836,
     "rw_data": 2052,
-    "zi_data": 149740
+    "zi_data": 149996
   },
   "threshold_pct": 92.0,
   "worktree_dirt_at_stamp": 0,