serialize inferred primary key in manifest.json

[dave-connors-3]

Housekeeping

• I am a maintainer of dbt-core

Short description

In #9650, we added a method for models to infer the primary key based on configured tests and/or constraints. We should serialize this as additional metadata in the manifest.json artifact

Acceptance criteria

output of model.infer_unique_key() is written to the manifest.json artifact for each relevant node

Suggested Tests

We already have unit testing on this method! Additional testing will be required for the artifact itself.

Impact to Other Teams

None

Will backports be required?

I don't think so

Context / Additional details

The primary key inference method on ModelNode requires a list of data_tests that apply to the model, which means data_tests must also be parsed by the point that we are able to populate this field on the ModelNode for serialization.

[FishtownBuildBot]

Opened a new issue in dbt-labs/docs.getdbt.com: dbt-labs/docs.getdbt.com#5497