chore: refactor background tasks processing

[vansangpfiev]

Describe Your Changes

This pull request introduces significant changes to the engine module, focusing on enhancing the ModelService with background task processing capabilities and refactoring estimation handling. Additionally, it includes minor improvements and cleanup in various parts of the codebase.

Enhancements to ModelService:

• Added a TaskQueue to handle background tasks, allowing for efficient processing of model estimations and other asynchronous tasks. (engine/main.cc [1] engine/services/model_service.cc [2] engine/services/model_service.h [3] [4] engine/utils/task_queue.h [5]
• Implemented the ProcessBgrTasks method to periodically estimate model resource usage and update the internal state. (engine/services/model_service.cc engine/services/model_service.ccR1409-R1432)

Refactoring and cleanup:

• Re-enabled the estimation feature in ListModel to provide hardware recommendations for models. (engine/controllers/models.cc engine/controllers/models.ccL221-R224)
• Renamed and refactored the GetEstimation method to separate synchronous and asynchronous estimation handling. (engine/services/model_service.cc [1] engine/services/model_service.h [2]
• Removed redundant logging statements from HardwareService::Restart to clean up the output. (engine/services/hardware_service.cc engine/services/hardware_service.ccL210-L212)

Minor improvements:

• Added missing include for task_queue.h in engine/main.cc to support the new task queue functionality. (engine/main.cc engine/main.ccR40)
• Ensured proper error handling and logging in various methods to improve code robustness. (engine/services/model_service.cc [1] [2]

Fixes Issues

• Closes #
• Closes #

Self Checklist

• Added relevant comments, esp in complex areas
• Updated docs (for bug fixes / features)
• Created issues for follow-up changes or refactoring needed