Add Approval pending Status and fix get_timesheet_detail API

[Siddhantsingh1230]

Description

This PR adds a check for the "Approval Pending" weekly status. If the total hours marked as "Approval Pending" exceed the employee's working hours, editing the timesheets will no longer update the weekly status. Additionally, an issue where cancelled documents were visible in the "Edit Timesheet" dialog has been fixed.

Relevant Technical Choices

• Add Approval Pending Status Count

Testing Instructions

• Add Timesheets for the entire week
• Sent it for approval
• Edit any timesheet
• The Status should not change

Additional Information:

N/A

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)