Enhance PerformanceBehaviour with request count and detailed docs

[Bram1903]

PerformanceBehaviour of the MediatR pipeline has been improved to introduce a request counter to track the number of requests application-wide.

This counter increments thread-safely and initiates performance timing only after the first 3 requests to avoid skewing data due to just-in-time compilation or other startup overheads. Also introduced detailed class and method commenting to enhance code understandability.

Changed The ILogger Paramater

• [Logger Type Parameter Update] Updated the logger in PerformanceBehaviour to be more specific:
  • Before: private readonly ILogger<TRequest> _logger;
  • After: private readonly ILogger<PerformanceBehaviour<TRequest, TResponse>> _logger;
  • This change allows for more context-aware logging within the PerformanceBehaviour class.

[neozhu]

thank you