Update usage ping data to track MRs with added rules
Problem to solve
Related to #220541 (closed)
We need to answer the question: How many MRS have added rules specific to the merge request?
Proposal
From #220541 (comment 358825262):
We can get this by querying the
approval_merge_request_rules
table and joining it withapproval_merge_request_rule_sources
table. Determine which ofapproval_merge_request_rules
records have noapproval_merge_request_rule_sources
. Then do a distinct count bymerge_request_id
.