* Fix `variables` handling override values set via `Set{VariableName}()` syntax
* Make `TenantsFeature` a dependency of `Multitenancy` to ensure streamlined initialization
From this point on, all application instances are multi-tenant with a single, default tenant. This streamlines the startup tasks that are designed around multitenancy.
* Add JS variable handling tests
* Ensure ExpandoObjects are correctly processed and synchronized between contexts and engines
Introduced a new helper method to process ExpandoObject conversions to JavaScript objects. Updated various handlers and functions to ensure ExpandoObjects are correctly processed and synchronized between contexts and engines. Added a new workflow test to validate the updated processing logic.
