1. The spec tests that if:
- The merge request is merged
- The target branch is deployed to production
- The `first_deployed_to_production_at` metric is `nil` (for some reason)
- The target branch is deployed to production again
- The `first_deployed_to_production_at` metric stays as `nil` (and is
not overwritten).
2. Failure only on MySQL due to some datetime weirdness.
All the code that pre-calculates metrics for use in the cycle analytics
page.
- Ci::Pipeline -> build start/finish
- Ci::Pipeline#merge_requests
- Issue -> record default metrics after save
- MergeRequest -> record default metrics after save
- Deployment -> Update "first_deployed_to_production_at" for MR metrics
- Git Push -> Update "first commit mention" for issue metrics
- Merge request create/update/refresh -> Update "merge requests closing issues"