fix: event logging with nested chats

[robraux]

Replaces PR #2582 per @ekzhu to run the open ai tests.

Why are these changes needed?

Runtime error encountered with autogen.runtime_logging.start when using nested chats.

Related issue number

Closes #2573 Replaced PR #2582

Checks

• [x] I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• [x] I've added tests (if relevant) corresponding to the changes introduced in this PR.
• [x] I've made sure all auto checks have passed.