Kubernetes metadata object

[kwarunek]

Currently, the schemas in this catalog define metadata as a plain object (eg https://github.com/datreeio/CRDs-catalog/blob/main/mutations.gatekeeper.sh/assign_v1.json) with additionalProperties: false, allowing only the certain fields. But in fact metadata is ObjectMeta that is common and well defined structure that allows labels, annotations...

This causes validation issues with kubeconform after a GitOps workflow (e.g., after validating output of flux build), as Flux adds labels and annotations to the metadata field.