feat: update abstract, execution times, and dataset names

[leomaurodesenv]

This pull request introduces several key updates to the project.

• Updated Abstract: The abstract has been updated to reflect the latest project information and metrics.
• Improved Data & Execution Times: This pull request adds the execution times for the document reader, which were previously missing. It also includes updated execution times for various other steps, leading to a more complete analysis.
• Corrected Dataset Name: The name of the horseracing dataset has been corrected to fix a typo.