Configure ArgoCD for private repo access

- Update repo URLs from HTTPS placeholder to git@github.com:lazorgurl/homelab.git
- Update container image refs from OWNER to lazorgurl
- Set KUBECONFIG env in Taskfile
- Fix kubeconfig-fetch.sh to auto-detect server IP from inventory
- Fix Ansible: callback plugin, br_netfilter ordering, ssh service name

Taskfile.yaml

@@ -4,6 +4,9 @@ vars:
   ANSIBLE_DIR: infra/ansible
   K8S_DIR: infra/kubernetes
 
+env:
+  KUBECONFIG: "{{.HOME}}/.kube/homelab"
+
 tasks:
   # Development
   dev: