Improvement: Event emission for state changes in Lamp model

[davideme]

Description

The Lamp domain model currently lacks event emission capabilities for state changes. Implementing this would allow for better observability and reactivity to lamp state changes.

Proposed Implementation

• Add an event system for the Lamp domain model
• Emit events when state changes occur (e.g., lamp turned on/off, name changed)
• Allow consumers to subscribe to these events
• Consider using a pub/sub pattern or observer pattern

Benefits

• Improved observability
• Ability to react to state changes
• Better separation of concerns
• Support for event-driven architecture

Acceptance Criteria

• Events are emitted for all state changes
• Events include the previous and new state
• Events include a timestamp
• Events can be subscribed to by external components
• Documentation is updated to reflect the new capability

Priority

Medium

Related Areas

• Domain models
• Event system
• Observability