feat(media): update maintainerr to v3 (new GHCR org)

Image moved from ghcr.io/jorenn92/maintainerr to ghcr.io/maintainerr/maintainerr
with the v3.x release series. v3 runs its own DB migrations on startup.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

stacks/media/docker-compose.yml

@@ -101,7 +101,7 @@ services:
 
   maintainerr:
     container_name: maintainerr
-    image: ghcr.io/jorenn92/maintainerr:latest
+    image: ghcr.io/maintainerr/maintainerr:latest
     restart: unless-stopped
     networks: [media, edge]
     env_file: