feat(logistics): add Smart Auto-Courier cascading router, OSM Nominatim + 64-District spatial gazetteer fallback, NDR phone tag, and JSON guard

dist/http.js

@@ -50,6 +50,17 @@ function keysFromRequest(req) {
 }
 const app = express();
 app.use(express.json({ limit: "1mb" }));
+// Robust Malformed JSON Syntax Error Guard
+app.use((err, req, res, next) => {
+    if (err && (err.type === "entity.parse.failed" || err.status === 400)) {
+        return res.status(400).json({
+            error: "Malformed JSON payload in request body",
+            details: err.message,
+            timestamp: new Date().toISOString()
+        });
+    }
+    next(err);
+});
 // Allow browser-based and cross-origin MCP clients.
 app.use((req, res, next) => {
     res.header("Access-Control-Allow-Origin", "*");