feat(proxy): upgrade Traefik image to v3.6

Upgrade default Traefik proxy configuration from v3.5 to v3.6, with Coolify version bump to beta.444.

🤖 Generated with Claude Code

Co-Authored-By: Claude <noreply@anthropic.com>

config/constants.php

@@ -2,7 +2,7 @@
 
 return [
     'coolify' => [
-        'version' => '4.0.0-beta.443',
+        'version' => '4.0.0-beta.444',
         'helper_version' => '1.0.12',
         'realtime_version' => '1.0.10',
         'self_hosted' => env('SELF_HOSTED', true),