Expressions server-side #46906
Description
- Add server-side implementation of Expressions service.
- Expose expression service server contract (which should look the same as client side one)
- Wait for Canvas to remove their usage of
__LEGACYexpressions APIs [Canvas] Remove dependency on legacy expressions APIs #74885 - Remove
__LEGACYAPIs from client & server [expressions] Remove legacy APIs. #75517
Parent issue: #46909