feat(proxy): add Traefik version tracking with notifications and dismissible UI warnings

- Add automated Traefik version checking job running weekly on Sundays
- Implement version detection from running containers and comparison with versions.json
- Add notifications across all channels (Email, Discord, Slack, Telegram, Pushover, Webhook) for outdated versions
- Create dismissible callout component with localStorage persistence
- Display cross-branch upgrade warnings (e.g., v3.5 -> v3.6) with changelog links
- Show patch update notifications within same branch
- Add warning icon that appears when callouts are dismissed
- Prevent duplicate notifications during proxy restart by adding restarting parameter
- Fix notification spam with transition-based logic for status changes
- Enable system email settings by default in development mode
- Track last saved/applied proxy settings to detect configuration drift

app/Models/Team.php

@@ -49,7 +49,9 @@ class Team extends Model implements SendsDiscord, SendsEmail, SendsPushover, Sen
     protected static function booted()
     {
         static::created(function ($team) {
-            $team->emailNotificationSettings()->create();
+            $team->emailNotificationSettings()->create([
+                'use_instance_email_settings' => isDev(),
+            ]);
             $team->discordNotificationSettings()->create();
             $team->slackNotificationSettings()->create();
             $team->telegramNotificationSettings()->create();