feat: parameterize complex junction geometry with Gaode reference

- 高德 GeoJSON 参考流程: `scripts/lib/gaode-junction-reference.js`
  与 `scripts/inspect-junction-reference.js` 将 GCJ-02 参考转换为 WGS84,
  按 node id/最近距离关联 OSM, 支持普通路口面和 `complex-cluster` 两种匹配。
- 复合路口模板 `complex-junction-v1`: `scripts/lib/complex-junction.js` 用参考
  几何校准 core 半径, 生成路口面、进口路面、斑马线、停止线、角部圆角与安全岛;
  拓扑/信号/连接全部沿用 OSM/native。
- 车道中心线控制要素避让: `compileLaneCenterlines` 现接收模板已产出的斑马线/停止线,
  新增 `trimLaneOutsideControls` 按到路口中心的半径定向裁剪; 标线源几何同步裁剪, 不再
  越过斑马线继续画到核心区。拓扑几何不变, connector 集合前后一致。
- 复合路口人行道转角: `buildComplexJunctionGeometry` 沿已定义的路缘生成 2m 宽转角带,
  复用圆角曲线, 通过 `islands` 通道并入 `sidewalk_surface`; 自交或坐标非有限时报
  `complex-junction-sidewalk-corner-fallback` 并跳过。
- 新增诊断: `complex-junction-configured-radius-ignored`、
  `lane-centerline-fully-inside-control`、`complex-junction-sidewalk-corner-fallback`。
- 死码清理: 移除未被调用的 `clusterApproachRing`。
- spec 更新: `.trellis/spec/pipeline/cli-and-stages.md` 复合路口小节补充控制要素
  避让顺序、人行道转角契约、Validation 矩阵三行; 索引新增导航。
- 任务产物 `08-19-gaode-junction-reference`: 8 条验收标准全部实测记录,
  Scope Drift / Verification Log / Known Gaps 三节沉淀本次工作。

Regression: test:native-road / test:road-workbench / test:preflight /
test:native-preview-traffic / test:package-contract / test:traffic-signals /
test:gaode-junction-reference 全绿; road:check ok=true, errors=[]。

scripts/test-road-workbench.js

@@ -8,6 +8,7 @@ const path = require("path");
 const html = fs.readFileSync(path.join(__dirname, "workbench", "index.html"), "utf8");
 assert.match(html, /id="width" type="number" min="1" step="0\.01"/);
 assert.match(html, /data-layer="sidewalks" type="checkbox" checked> 路缘与步行带/);
+assert.match(html, /data-layer="gaodeReference" type="checkbox" checked> 高德规整路口参考/);
 assert.match(html, /id="scene-preview" type="checkbox"/);
 assert.match(html, /id="selected-junction" hidden/);
 const app = fs.readFileSync(path.join(__dirname, "workbench", "app.js"), "utf8");
@@ -18,7 +19,13 @@ assert.match(app, /road\.segmentId === selectedRoad\.segmentId/);
 assert.match(app, /sidewalkLeft: rightInput\.checked, sidewalkRight: leftInput\.checked/);
 assert.match(app, /function nativeSurfaceStyle\(feature\)/);
 assert.match(app, /reference: new VectorLayer\(\{ source: source\(\), visible: false/);
+assert.match(app, /gaodeReference: new VectorLayer/);
+assert.match(app, /state\.junctionReference\?\.converted/);
+assert.match(app, /gaodeReferenceColors/);
 assert.match(app, /scene mode must render fills only/);
+assert.match(app, /readFeatures\(state\.layers\.nativeRoadSurface\)/);
+assert.doesNotMatch(app, /nativeRoadSurface, \(feature\) => !feature\.properties\?\.cluster_id/);
+assert.doesNotMatch(app, /&& !feature\.properties\?\.cluster_preview\)/);
 assert.match(app, /scenePreviewToggle\.onchange/);
 assert.match(app, /layers\.sidewalks\.setVisible\(document\.querySelector\('\[data-layer="sidewalks"\]'\)\.checked\)/);
 assert.match(app, /function selectJunction\(feature\)/);
@@ -75,6 +82,8 @@ assert.match(app, /headFeatures\.push\(new Feature/);
 assert.match(app, /faceFeatures\.push\(new Feature/);
 const server = fs.readFileSync(path.join(__dirname, "road-workbench.js"), "utf8");
 assert.match(server, /\/api\/traffic-signals\/generate/);
+assert.match(server, /function compileFresh\(configPath\)/);
+assert.match(server, /execFileSync\(process\.execPath, \[path\.join\(repoRoot, "scripts", "compile-native-roads\.js"\)/, "workbench regeneration must load the current compiler in a fresh process");
 assert.doesNotMatch(app, /导入 QGIS|导出 QGIS/);
 assert.doesNotMatch(server, /traffic-signals\/(?:import|export)-qgis/);
 console.log("road workbench tests passed");