Sub-issue description

Splits out part of 4376 to separate model updates from new script request:

Create 2 new columns

• created_at_reference: This will store the date of domain record creation
• registry_created_at: This will store the date of domain registry creation
• Add appropriate constraints like created_at < registry_created_at

In the code, write the correct information to these columns. This means that when the domain entry is created, the same value will be written to created_at and created_at_reference. When the domain is created in the registry, the same value will be written to created_at and registry_created_at

Write tests for these new values

Acceptance criteria

• Domain model is updated with new created metadata fields

Additional context

No response