修复 SGS SDK 导览数据源与模型加载

升级 SDK API 数据契约，补齐 guideStops、业务 POI、诊断与路线数据接口。

修复 SDK 模式下 POI/模型/楼层混用静态数据的问题，并为 ThreeMap 模型加载增加短退避重试。

static/sgs-map-sdk/package.json

@@ -1,7 +1,7 @@
 {
   "name": "@sgs/map-sdk",
-  "version": "2.3.0",
-  "description": "SGS Map SDK",
+  "version": "2.4.0",
+  "description": "SGS Map SDK API contract copy for frontend-miniapp; iframe runtime is not enabled by this project",
   "main": "./index.global.js",
   "types": "./index.d.ts",
   "exports": {
@@ -10,12 +10,13 @@
       "default": "./index.global.js"
     }
   },
-  "sideEffects": true,
+  "sideEffects": false,
   "files": [
     "index.global.js",
     "index.global.js.map",
     "index.d.ts",
     "README.md",
+    "CHANGELOG.md",
     "sdk-quickstart.md",
     "sdk-api-reference.md",
     "sdk-protocol.md"