chore(ledger): meas 与 n17 两笔合入后回填台账/凭证/覆盖率并同步计数

task/meas-snap 合入（merge 9c2653c，meas 快照层，分支树冲突由 lead 并集
手工解：id_registry 三族 UIDATA/VOLSYNC/MEAS 共存，JSON 校验过；该合并
提交按 mem 域例外 --no-verify，理由=合并树 .map 滞后，回填本笔兑现）。
task/n17-probe 合入（merge 969fc5c，drop 路径异步化 Flash +16 B/RAM 0）。
合并后 @build 0/0：Code=217,828 / RO=21,600 / RW=1,264 / ZI=132,840；
RW_IRAM1 76,664 B（58.5%）、CCM 87.9% 不变。覆盖率 38/38 套件基线登记
（meas.c 入账）；凭证按最终 .map 重盖。计数：钩子 44→45、单测钩子
20→21、总闸 37→38 套（AGENTS + 门禁 README）。

scripts/test_coverage_baseline.json

@@ -32,6 +32,14 @@
       "lines_covered": 126,
       "lines_valid": 130
     },
+    "App/algo/meas.c": {
+      "func_rate": 1.0,
+      "funcs_covered": 5,
+      "funcs_valid": 5,
+      "line_rate": 1.0,
+      "lines_covered": 64,
+      "lines_valid": 64
+    },
     "App/algo/phasor.c": {
       "func_rate": 1.0,
       "funcs_covered": 6,
@@ -293,8 +301,8 @@
       "funcs_covered": 53,
       "funcs_valid": 53,
       "line_rate": 0.9978,
-      "lines_covered": 889,
-      "lines_valid": 891
+      "lines_covered": 891,
+      "lines_valid": 893
     },
     "Drivers/BSP/NETCFG/ftp_cfg.c": {
       "func_rate": 1.0,
@@ -442,6 +450,15 @@
       "lines_total": 166,
       "ok": true
     },
+    "meas": {
+      "files": {
+        "App/algo/meas.c": 64,
+        "App/algo/phasor.c": 55,
+        "App/algo/sample_ring.c": 41
+      },
+      "lines_total": 160,
+      "ok": true
+    },
     "nand_port": {
       "files": {
         "Drivers/BSP/GD5F2GQ5UE/nand_ftl.c": 253
@@ -486,9 +503,9 @@
     },
     "net_socket": {
       "files": {
-        "Drivers/BSP/NET/net_socket.c": 891
+        "Drivers/BSP/NET/net_socket.c": 893
       },
-      "lines_total": 891,
+      "lines_total": 893,
       "ok": true
     },
     "phasor": {
@@ -625,6 +642,7 @@
     "App/algo/adc_health.c",
     "App/algo/adc_input.c",
     "App/algo/freq.c",
+    "App/algo/meas.c",
     "App/algo/phasor.c",
     "App/algo/prot_elm.c",
     "App/algo/prot_set.c",
@@ -665,16 +683,16 @@
   ],
   "totals": {
     "files_generated_excluded": 5,
-    "files_tested": 41,
-    "files_untested": 120,
-    "func_rate": 0.9264,
-    "funcs_covered": 428,
-    "funcs_valid": 462,
-    "line_rate": 0.8962,
-    "lines_covered": 5933,
-    "lines_valid": 6620,
-    "modules_ok": 37,
-    "modules_total": 37
+    "files_tested": 42,
+    "files_untested": 121,
+    "func_rate": 0.9272,
+    "funcs_covered": 433,
+    "funcs_valid": 467,
+    "line_rate": 0.8972,
+    "lines_covered": 5999,
+    "lines_valid": 6686,
+    "modules_ok": 38,
+    "modules_total": 38
   },
   "untested_sources": [
     {
@@ -710,12 +728,12 @@
       "path": "Drivers/BSP/SD2506/sd2506.c"
     },
     {
-      "code_lines": 242,
-      "path": "App/app/ui_data_feed.c"
+      "code_lines": 249,
+      "path": "App/task/adc_task.c"
     },
     {
-      "code_lines": 224,
-      "path": "App/task/adc_task.c"
+      "code_lines": 242,
+      "path": "App/app/ui_data_feed.c"
     },
     {
       "code_lines": 206,
@@ -885,6 +903,10 @@
       "code_lines": 31,
       "path": "Drivers/BSP/UI/ui_w_editor.h"
     },
+    {
+      "code_lines": 29,
+      "path": "App/algo/meas.h"
+    },
     {
       "code_lines": 29,
       "path": "Drivers/BSP/NET/lftpd/lftpd_auth.h"