feat(courier): 小飞侠签收照联调与 OSS 失败回退

补齐 admin 100108 联调入口；track 优先用缓存签收照，上传失败回退 dataURI，日志截断大图。

Co-authored-by: Cursor <cursoragent@cursor.com>

server/dukang-api/src/integrations/courier/courier-log.util.ts

@@ -47,13 +47,27 @@ export function sceneForXfxCmd(cmd: string) {
   return CMD_SCENE[cmd] ?? `XFX_CMD_${cmd}`;
 }
 
+/** 签收照等大字段入库前截断，避免撑爆 JSON / 影响后续业务返回 */
+function sanitizeCourierResponseBody(scene: string, body: unknown): Record<string, unknown> | undefined {
+  if (body === undefined) return undefined;
+  if (typeof body !== 'object' || body === null) {
+    return { value: body };
+  }
+  const root = { ...(body as Record<string, unknown>) };
+  if (scene === 'GET_SIGN_PHOTOS' && Array.isArray(root.data)) {
+    const photos = root.data as unknown[];
+    root.data = photos.map((item) => {
+      if (typeof item !== 'string') return item;
+      if (item.length <= 120) return item;
+      return `${item.slice(0, 80)}…(len=${item.length})`;
+    });
+    root.dataCount = photos.length;
+  }
+  return root;
+}
+
 export async function logCourierCall(prisma: PrismaService, input: LogCourierCallInput) {
-  const responseBody =
-    input.responseBody === undefined
-      ? undefined
-      : typeof input.responseBody === 'object' && input.responseBody !== null
-        ? (input.responseBody as Record<string, unknown>)
-        : { value: input.responseBody };
+  const responseBody = sanitizeCourierResponseBody(input.scene, input.responseBody);
 
   const row = await prisma.logThirdParty.create({
     data: {