Add dbt data integrity tests to the model database tables

[dfsnow]

Last week @jeancochrane found a duplicate PIN in one of our model tables (I believe model.assessment_pin). I'm not sure how that snuck in there, but we should take steps to catch such issues in the future.

Let's add dbt data integrity tests to each of the model database sources. We can trigger the tests as part of the weekly cron job and/or via an API call after the completion of a model run (similar to the one called via service-spark-iasworld). We'll mostly want to test for null values and uniqueness.

[Damonamajor]

https://us-east-1.console.aws.amazon.com/s3/buckets/ccao-model-results-us-east-1?region=us-east-1&bucketType=general&prefix=feature_importance/year%3D2024/&showversions=false

feature importance is duplicated for 2024-02-05-sad-tristan.parquet

parameter_search does not seem to have correct keys