* Fix AG-UI forwardedProps JSON property name
The RunAgentInput.ForwardedProperties property was using the wrong JSON property
name 'forwardedProperties' instead of 'forwardedProps' per the AG-UI protocol
specification.
This fix:
- Changes JsonPropertyName from 'forwardedProperties' to 'forwardedProps'
- Adds comprehensive integration tests for forwarded properties
Fixes#2468
* Fix formatting
