Bundle a tested Traefik in releases, the image and the installer

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

deploy/blacktip.service

@@ -7,6 +7,8 @@ Wants=network-online.target
 [Service]
 User=blacktip
 Group=blacktip
+# The Traefik that ships with Blacktip; set BLACKTIP_TRAEFIK= (empty) in the env file for the built-in proxy.
+Environment=BLACKTIP_TRAEFIK=/usr/local/lib/blacktip/traefik
 EnvironmentFile=-/etc/blacktip/blacktip.env
 ExecStart=/usr/local/bin/blacktip -data /var/lib/blacktip
 WorkingDirectory=/var/lib/blacktip