Ah, good call @tgolubeva!
My guess is that the reference in ReconciliationEligibilityService is being overly defensive or it's code that was superseded by the last_quarter check. https://gitlab.com/gitlab-org/customers-gitlab-com/-/merge_requests/3973 shows that it used to be checked before last_quarter and was moved after in https://gitlab.com/gitlab-org/customers-gitlab-com/-/merge_requests/4123. This makes me think the risk of changing from 45 days -> 15 days is minimal for the eligibilty check (we could possibly even remove the reference here, but that's outside the scope of this issue).
For CreateReconciliationService, this reference is about not creating reconciliations after the subscription end_date so the reference is correct behavior and what we want.
Reasoning:
This will likely require the code changes similar to the following:
Subscription::GRACE_PERIOD_AFTER_EXPIRATION from 45.days to 15.days
SubscriptionHelper::GRACE_PERIOD_AFTER_EXPIRATION (30 days) and replace its single usage in has_active_reseller_subscription? with Subscription::GRACE_PERIOD_AFTER_EXPIRATION
not_valid_for_renewal? to account for active temporary extensions — when one exists, the subscription should remain renewable until the extension's end_date
renewal_expiration_date in both Subscriptions::OverviewPresenter and Subscriptions::ActionPresenter to use the extension's end_date when presentsubscription_spec.rb, presenter specs, reconciliation service specs, and subscription_helper specsTesting considerations: