Create an infrastructure sample and exploratory deployment matrix

## Objective

Build a sample demonstrating environment configuration, options, per-user settings, structured logging, exceptions, background work, health state, and graceful shutdown. Validate unpackaged and representative packaged/published deployments, read-only locations, multiple users, Terminal Services, and offline operation.

## Completion guidance

- Keep the implementation focused on the objective while allowing the assignee to improve the approach based on research.
- Document important decisions, rejected alternatives, dependencies, and follow-up work.
- Add or update tests and documentation appropriate to the work.
- Verify locally and in CI where the task changes code or generated artifacts.

Start by reviewing the objective and the Windows Forms repository context, then map the requested configuration, background-work, health, logging, exception, and shutdown scenarios. Define the sample and deployment matrix, document decisions and follow-up work, and add appropriate tests and documentation. Done means the scenarios and representative unpackaged, packaged, read-only, multi-user, Terminal Services, and offline deployments are validated locally and in CI where applicable.

Written by the indexing model from the issue text.