Update logic to update Weekly Status based on per day-priority status

[Siddhantsingh1230]

Description

This PR refactors the update_weekly_status_of_timesheet utility to use a per-day priority-based approach for determining the overall weekly approval status.

Previously, the weekly status was derived based on the total count of timesheets, which led to inaccurate results when users created multiple timesheets on the same day.

For example:
A user creates 1 timesheet each for Monday to Wednesday and 2 timesheets on Thursday, resulting in 5 timesheets.
If the employee's working days are also 5, the system considers the quota met and marks the week as "Approved" once these are approved by the manager.
However, the user is then unable to add a timesheet on Friday, which is a valid working day.

To resolve this:
We now evaluate daily statuses based on the highest priority status among all timesheets for a given day.
Weekly status is derived from the distribution of these daily statuses, ensuring accurate and fair handling of timesheet approvals.
This approach eliminates issues arising from multiple timesheets on the same day and respects the actual working day count for the employee.

Relevant Technical Choices

• Refactors update_weekly_status_of_timesheet to derive weekly status based on highest-priority status per working day, preventing issues from multiple timesheets on the same day.

Testing Instructions

• Go to NPMS
• Add Timesheets
• Send them for approval
• Normal Workflow should not break

Additional Information:

Priority of status are as followed
Rejected > Approval Pending > Approved > Not Submitted

Screenshot/Screencast

N/A

Checklist

• I have carefully reviewed the code before submitting it for review.
• This code is adequately covered by unit tests to validate its functionality.
• I have conducted thorough testing to ensure it functions as intended.
• A member of the QA team has reviewed and tested this PR (To be checked by QA or code reviewer)

[niraj2477]

closed/opened to re-run the test