fix(evobgp): update header handling in evobgpProxyRoutes to preserve content-encoding

- Modified header processing to retain content-encoding, ensuring proper handling of gzip responses from upstream servers.
- Added comments for clarity on the importance of this change to avoid issues with client response interpretation.

Made-with: Cursor

backend/routes/evobgpProxyRoutes.js

@@ -79,7 +79,9 @@ function createEvobgpProxy({ logger = console } = {}) {
 
     const clientReq = lib.request(opts, (clientRes) => {
       res.status(clientRes.statusCode);
-      const skip = new Set(['connection', 'transfer-encoding', 'content-encoding']);
+      // Не отбрасываем content-encoding: иначе upstream может отдать gzip-тело,
+      // а клиент не узнает, что его нужно распаковать (в браузере будет «мусор»).
+      const skip = new Set(['connection', 'transfer-encoding']);
       Object.keys(clientRes.headers).forEach((k) => {
         if (!skip.has(k.toLowerCase())) {
           res.setHeader(k, clientRes.headers[k]);