Bug fixes in running Nasri2019 analysis

[porya-gohary]

This pull request includes two bug fixes in the framework:

1. Job Set Handling in Schedule Abstraction Graph Analysis (Nasri2019)

   • The schedule abstraction graph analysis operates on a job set, not a task set. When analyzing a task set (rather than a single DAG task), it must first be unfolded into a job set before being passed to the analysis.
   • This issue likely affected the results in Fig. 11(a, b) and Fig. 16(a, b, e, f) of the paper.

2. Correcting Runtime Reporting for Schedule Abstraction Graph Analysis

   • Previously, the reported runtime was based on wall clock time, which included the time required to unfold the task set.
   • This has been corrected to report CPU time, which provides a more accurate measurement, especially when the analysis is run with the parallel option. The unfolding time is now excluded from the reported runtime.