config(media): add SABnzbd host whitelist for web access

Adds HOST_WHITELIST env var to allow access from container name,
localhost, LAN IP, and hostname.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

stacks/media.yml

@@ -172,6 +172,7 @@ services:
       - PUID=1000
       - PGID=1000
       - TZ=Europe/Amsterdam
+      - HOST_WHITELIST=sabnzbd,localhost,192.168.86.149,tower-of-joy
     healthcheck:
       test: ["CMD-SHELL", "curl -fSs http://localhost:8080/api?mode=version || exit 1"]
       interval: 30s