fix(MikrotikSpeedTest): remove 'direction' parameter from speed test configuration to streamline request handling

backend/routes/mikrotikConfigRoutes.js

@@ -987,7 +987,6 @@ async function speedTestViaTunnel(req, res) {
       user: remoteCreds.user,
       password: remoteCreds.password || '',
       protocol: 'tcp',
-      direction: 'both',
       'test-duration': `${durationSeconds}s`,
     };
 
@@ -997,7 +996,6 @@ async function speedTestViaTunnel(req, res) {
         `address=${body.address}`,
         `user=${body.user}`,
         'protocol=tcp',
-        'direction=both',
         `test-duration=${durationSeconds}s`,
       ];
       console.log('[mikrotik][speedTestViaTunnel]', {