Some Django models are not soft-deletable #6770
Description
During #6760, we found that the following models are not soft-deletable:
- InviteLink
- OrganisationWebhook
- Tag
- SlackEnvironment
- EnvironmentAPIKey
- Webhook
- Identity
- Trait
- MultivariateFeatureOption
- FeatureSegment
- MultivariateFeatureStateValue
- MetadataField
- MetadataModelField
- MetadataModelFieldRequirement
- Metadata
We need to understand the reasons for them to stay hard-deletable and document those, or convert them to soft-deletable, if possible.