Add STEWARD__MATRIX__* literals to the deployment secret so the Matrix appservice bot is configured when the cluster secret is created. Values come from gitea repo vars/secrets (MATRIX_HOMESERVER_URL, MATRIX_AS_TOKEN, etc.) and are only populated when those are set. Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>