Agents SDK Deployment Manager example for local control-plane and tracing

AI Impact Summary

The new deployment manager example provides a local control plane to run and observe Agents SDK demo projects, using a Docker-based target and SandboxAgent to spin sandbox containers. It wires the app process with AGENTS_SDK_MANAGER_* environment variables and posts traces to the manager via a local ingestion endpoint (http://127.0.0.1:8732/api/traces/ingest), storing results in a manager SQLite database for the UI to render deployments, traces, and events. The workflow supports generating app Dockerfiles, deploying with make targets, and labeling containers with agents-sdk.* metadata to map runtime containers back to deployments, enabling end-to-end testing of deployment, observability, and lifecycle management in a local environment. This capability accelerates validation of local demos and integration points, but relies on Docker socket access and warrants security consideration in CI or multi-tenant setups.