radarr: 5.17.2 -> 6.3.0 [MAJOR]

Campaign 7 catalog sweep.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Nn3VgQk9iwEGgyx6QJ2NvE

templates/radarr/docker-compose.yml

@@ -15,7 +15,7 @@
 
 services:
   radarr:
-    image: lscr.io/linuxserver/radarr:5.17.2
+    image: lscr.io/linuxserver/radarr:6.3.0
     container_name: radarr
     restart: unless-stopped
     environment: