* Optimize spans
* Refactor RedisAspect.php to fix database index default value
* Refactor RedisAspect.php to include db.redis.connection parameter
* Refactor RedisAspect.php to include db.redis.database_index parameter
* Refactor TracingRequestListener.php to improve source handling
* Refactor TracingRequestListener.php to improve operation description
---------
Co-authored-by: Deeka Wong <8337659+huangdijia@users.noreply.github.com>