.NET: Python: Close any gaps in Foundry integrations

[markwallace-microsoft]

• Support for Hosted Agents. Review existing samples and verify everything is working. Check with Hosted Agents team on any issues that need to be addressed.
• Add an IContextProvider implementation for Foundry Memory.
• Integrate directly with Foundry Tools from agents that use any chat clients. Meeting to discuss this will be help this week.
• Support for Foundry Observability and Evaluations. Review existing samples and verify everything is working.