Implement CQRS Read Model Projections

[duhowise]

For every domain event, implement corresponding projection handlers that produce query-optimized read models for WPF frontend and reporting needs.

Tasks:

• Identify required read models for UI and reports.
• Implement event handlers to project events into relational or NoSQL read stores.
• Ensure real-time update and consistency for the WPF client.
• Use the following projection scaffolding for implementation:

// Projections/VoteProjection.cs
// ... see code example in docs