Fix Gitea username: julia → lazorgurl in all registry/API refs

Gitea admin username is julia but the Gitea account name is
lazorgurl. Update container registry URLs, workflow refs,
Taskfile API calls, and pull secret placeholders.

Taskfile.yaml

@@ -106,7 +106,7 @@ tasks:
         echo ""
         echo "=== Mirror Sync ==="
         curl -s -H "Authorization: token $(kubectl get secret argocd-gitea-token -n argocd -o jsonpath='{.data.token}' | base64 -d)" \
-          https://gitea.coreworlds.io/api/v1/repos/julia/homelab | jq '{mirror: .mirror, mirror_updated: .mirror_updated}'
+          https://gitea.coreworlds.io/api/v1/repos/lazorgurl/homelab | jq '{mirror: .mirror, mirror_updated: .mirror_updated}'
 
   gitea:runner:register:
     desc: Register an external Gitea Actions runner