* Add an AsyncLocal AgentRunContext
* Update AgentRunContext session naming
* Make AgentRunContext readonly and add ADR
* Make session nullable and add unit tests
* Add unit tests for setting the context in AIAgent
* Apply suggestions from code review
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
* Fix sample in ADR
* Fix broken unit test
* Add unit test for checking if middleware can access AgentRunContext
* Fix build error after merge.
* Fix AgentRunContextTests after merge from main
---------
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
