fix: hardcode Traefik port labels (Gotcha 6 - vars not expanded in labels)

Coolify does not expand ${VAR} in label values. All loadbalancer port
labels must use hardcoded values:
- trilium:   ${TRILIUM_HTTP_PORT}  → 8080
- adguard:   ${ADGUARD_HTTP_PORT}  → 80
- authentik: ${AUTHENTIK_HTTP_PORT} → 9000
- gitea:     ${GITEA_HTTP_PORT}    → 3000
- wireguard: ${WG_UI_PORT}         → 51821

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

adguard/stack.env

@@ -6,7 +6,7 @@ ADGUARD_CERT_CRT_PATH=
 ADGUARD_CERT_KEY_PATH=
 ADGUARD_DOT_PORT=
 ADGUARD_IPV4=
-ADGUARD_HTTP_PORT=
+ADGUARD_HTTP_PORT=80
 
 ##### Traefik / red #####
 TRAEFIK_DOCKER_NETWORK=