CI runner (Forgejo DinD) runs jobs as Docker containers — no in-cluster
SA token available. Industry standard: dedicated SA with minimal RBAC,
long-lived token as KUBECONFIG_B64 secret in Forgejo.
SA: ci-tekton-trigger (namespace: api)
Permissions: create/get/watch/delete PipelineRuns, get TaskRuns, get pod logs
Token: kubernetes.io/service-account-token secret
