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/lib/native-traffic-signals.js

@@ -12,10 +12,26 @@ const {
 const SCHEMA = "native-traffic-signals/v1";
 
 function loadOrGenerate(file, osmText, stopLines, intersections) {
-  if (fs.existsSync(file)) return validateDocument(JSON.parse(fs.readFileSync(file, "utf8")), osmText);
+  if (fs.existsSync(file)) {
+    const document = JSON.parse(fs.readFileSync(file, "utf8"));
+    try {
+      return validateDocument(document, osmText);
+    } catch (error) {
+      // OSM edits can invalidate the stable identities in a document that was
+      // itself generated from OSM. User-authored documents must remain strict.
+      if (document?.provenance === "generated:osm-controls" && isStaleSourceReferenceError(error)) {
+        return generate(osmText, stopLines, intersections);
+      }
+      throw error;
+    }
+  }
   return generate(osmText, stopLines, intersections);
 }
 
+function isStaleSourceReferenceError(error) {
+  return error instanceof Error && /^traffic signal feature \d+: (approach_id .* is not present on OSM control|control_id .* is not present in the current OSM)/.test(error.message);
+}
+
 function generate(osmText, stopLines, intersections) {
   const controls = parseOsm(osmText).trafficSignalControls;
   return { schema: SCHEMA, provenance: "generated:osm-controls", assemblies: buildTrafficSignalFeatures(stopLines, intersections, controls) };