Optimize performance of logging, add printing milliseconds

Type of change

• Bug Fix
• Feature

Does this introduce a change in the core logic?

• [No]

Does this introduce a change in the cloud provider implementation, if so which cloud?

• AWS
• Azure
• GCP
• IBM

Updates description?

Some final enhancements for logging system:

• Add printing milliseconds to log messages (in format: 2023-08-16 14:30:40.173)
• Optimize performance (removed dynamic memory allocation for Message, etc)
• Fix/suppress CppCheck warnings

Issue: #53 (closed)

Benchmark before this particular MR:

After optimizations: