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>

versions.json

@@ -1,10 +1,10 @@
 {
     "coolify": {
         "v4": {
-            "version": "4.0.0-beta.443"
+            "version": "4.0.0-beta.444"
         },
         "nightly": {
-            "version": "4.0.0-beta.444"
+            "version": "4.0.0-beta.445"
         },
         "helper": {
             "version": "1.0.11"