Go through the code and find all TODO comments and create issues

[rysweet]

What happened?

there are places in the code where authors (yours truly is guilty) left TODO comments - these should all get turned into GH Issues

What did you expect to happen?

All TODO comments require an issue

How can we reproduce it (as minimally and precisely as possible)?

grep -I todo *

AutoGen version

0.4

Which package was this bug in

Core

Model used

No response

Python version

No response

Operating system

No response

Any additional info you think would be helpful for fixing this bug

No response