fix(traefik): Simplify HostSNIRegexp pattern for wildcard subdomains

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

smoothschedule/compose/production/traefik/traefik.yml

@@ -58,7 +58,7 @@ tcp:
     # Catch-all for tenant subdomains at TLS layer
     # This matches any subdomain that isn't handled by specific HTTP routers
     subdomain-sni-router:
-      rule: 'HostSNIRegexp(`^[a-z0-9-]+\\.smoothschedule\\.com$`)'
+      rule: 'HostSNIRegexp(`.*\\.smoothschedule\\.com`)'
       entryPoints:
         - web-secure
       service: nginx-tcp