* Remove pm-26462-milestone-3 flag from PricingClient
Simplify FamiliesAnnually2025 lookup to always return "families-2025".
Remove PreProcessFamiliesPreMigrationPlan deployment safeguard method
and its call sites. Remove unused IFeatureService constructor dependency.
* Remove pm-26462-milestone-3 flag from UpcomingInvoiceHandler.HandleForOrganizationAsync
Remove milestone3 variable and parameter from
AlignOrganizationSubscriptionConcernsAsync. Simplify guard clause
to only check plan type.
* Update PricingClientTests after pm-26462-milestone-3 removal
Remove IFeatureService from test setup. Delete tests for flag-disabled
safeguard behavior. Clean up remaining test names.
* Update UpcomingInvoiceHandlerTests after pm-26462-milestone-3 removal
Remove all feature flag mock setup lines for PM26462_Milestone_3.
Delete test methods that verified flag-disabled behavior.
* Merge GetPlan lookup key test regions into one
* refactor: [PM-39087] remove PM-26793 feature flag from PricingClient
* test: add ListPremiumPlans and GetAvailablePremiumPlan coverage to PricingClientTests
* Remove feature flag and move StaticStore plans to MockPlans for tests
* Remove old plan models / move sponsored plans out of StaticStore
* Run dotnet format
* Add pricing URI to Development appsettings for local development and integration tests
* Updated Api Integration tests to get current plan type
* Run dotnet format
* Fix failing tests
* new feature flag
* first pass at changes
* safeguard against billing-pricing not being deployed yet
* handle families pre migration plan
* wrong stripe id
* tests
* unit tests
