Refactor Broker Runtime And MQTT Repository Architecture

[Dumdart]

Summary

Refactors broker runtime state, MQTT callbacks, repositories, and dependency wiring to improve separation of concerns and persistence behavior.

Changes

Bug Fixes

• Improve broker configuration, observer, subscription, and runtime persistence handling.
• Update CI, project configuration, and dependency locking.

Features

• Add broker profile identity and expanded repository interfaces.
• Introduce asynchronous callback bridging and revised MQTT callback handling.

Refactoring

• Reorganize application services, runtime state management, database context, MQTT client integration, and repository implementations.
• Update dependency injection and application runtime wiring.

Improvements

• Expand and update unit and integration coverage across application, MQTT, repository, GUI, API, and runtime components.

Testing

• Updated the affected test suites covering application dependencies, MQTT behavior, repositories, persistence, APIs, GUI flows, and runtime behavior.