Add external agent sample

[ninghu]

This pull request introduces a new sample for external agent observability in Foundry, featuring a weather agent built with LangChain and instrumented with Microsoft's OpenTelemetry Python distribution. The sample demonstrates how to deploy the agent to Azure Container Apps, generate telemetry, register the agent in Foundry, and run trace-based evaluations. The changes include all necessary code, deployment scripts for both Bash and PowerShell, documentation, and configuration templates.

The most important changes are:

Sample code and configuration:

• Added a complete sample for an external weather agent, including the main agent code (weather_agent.py), traffic generator (generate_traffic.py), agent registration script (register_external_agent.py), and requirements (requirements.txt). [1] [2] [3]
• Provided a .env.example file listing all required environment variables for local development and deployment.

Deployment automation:

• Added deployment scripts for both Bash (deploy.sh) and PowerShell (deploy.ps1) to build, push, and deploy the agent container to Azure Container Apps, as well as generate test traffic and handle environment configuration. [1] [2]
• Included a Dockerfile to containerize the weather agent for deployment.

Documentation:

• Added a comprehensive README.md explaining the architecture, prerequisites, step-by-step instructions for deployment, registration, evaluation, and cleanup of the external agent sample.

[github-actions]

👋 Thanks for your contribution, @ninghu!

This repository is read-only. As a Microsoft contributor, please submit your PR to the private staging repository instead:

👉 foundry-samples-pr

See CONTRIBUTING.md for full instructions.