improve: fix thread pool shutdown

[dudantas]

Description

Fixed an issue where the ThreadPool::shutdown() method would hang indefinitely due to waiting on threads without proper condition signaling.

Depuration with gdb:

Normal loading:

Behaviour

Actual

The ThreadPool shutdown process hangs indefinitely with the message "Shutting down thread pool..." without completing.

Expected

The ThreadPool should properly notify threads to complete their tasks and shut down gracefully, avoiding hanging indefinitely.

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested

The fix was tested by reproducing the shutdown scenario where the hanging issue occurred. The shutdown process now correctly notifies threads to complete, and the shutdown process finishes as expected.

• Tested the shutdown of ThreadPool after an error in loading, confirming no indefinite hang.

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I checked the PR checks reports
• I have commented my code, particularly in hard-to-understand areas
• My changes generate no new warnings

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud