chore(valkey): add redis_exporter

chore(valkey): add cron event

chore(charts): change canary app version

chore(redis): headless svc does not require ports

chore(redis): use podman replace docker

feat(redis): switch charts to oci

chore(chars): change org to image_tag

feat(redis): change redis to statefulset

chore(.travis.yml): add .travis.yml