feat(server): add raw body parsing for multipart/form-data and application/octet-stream

- Implemented a new middleware to handle raw body parsing for specific content types, allowing for larger payloads up to 5mb.
- Enhanced form body serialization to support Buffer input, improving compatibility with various data formats during proxy interactions.

backend/routes/clickTtHttpPageRoutes.js

@@ -45,6 +45,10 @@ function serializeFormBody(req) {
     return req.rawBody;
   }
 
+  if (Buffer.isBuffer(req.body) && req.body.length > 0) {
+    return req.body.toString('utf8');
+  }
+
   if (typeof req.body === 'string') {
     return req.body;
   }