fix(UX): record reason for skipping attendance or marking absent for auto attendance

[ruchamahabal]

Problem

In the Auto Attendance scheduler job there are multiple reasons why an employee is marked Absent or attendance is skipped for check-in records. The user has to compare the calculated working hours with the shift timings and investigate Employee Check-ins to find out why the employee was marked Absent or why attendance was skipped for the employee.

Fix

Add comments to the Attendance record when the scheduler runs:

For not meeting the working hours threshold:

Due to missing Employee Checkins:

Add relevant comments to Employee Checkin when the scheduler runs:

The Skip Auto Attendance checkbox is editable so this comment is required to distinguish whether it was skipped during the scheduler job or skipping was enabled by the user during log creation:

Adding comments of type "Comment" instead of "Info" because comments are visible in the report view and can be exported.

[codecov]

Codecov Report

Merging #30844 (5ad78ed) into develop (389c285) will decrease coverage by 0.18%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop   #30844      +/-   ##
===========================================
- Coverage    61.83%   61.65%   -0.19%     
===========================================
  Files         1079     1079              
  Lines        69700    69715      +15     
===========================================
- Hits         43100    42981     -119     
- Misses       26600    26734     +134     

Impacted Files	Coverage Δ
...xt/hr/doctype/employee_checkin/employee_checkin.py	94.26% <100.00%> (+0.62%)	⬆️
erpnext/hr/doctype/shift_type/shift_type.py	86.41% <100.00%> (+0.34%)	⬆️
...eport/item_variant_details/item_variant_details.py	31.32% <0.00%> (-53.02%)	⬇️
...tch_item_expiry_status/batch_item_expiry_status.py	67.92% <0.00%> (-24.53%)	⬇️
...wise_balance_history/batch_wise_balance_history.py	67.79% <0.00%> (-22.04%)	⬇️
...em_wise_sales_register/item_wise_sales_register.py	51.58% <0.00%> (-11.77%)	⬇️
...saction/incorrect_balance_qty_after_transaction.py	88.37% <0.00%> (-9.31%)	⬇️
...t/accounts/report/sales_register/sales_register.py	70.76% <0.00%> (-7.02%)	⬇️
...unts/report/purchase_register/purchase_register.py	71.71% <0.00%> (-6.58%)	⬇️
...urity_shortfall/process_loan_security_shortfall.py	93.75% <0.00%> (-6.25%)	⬇️
... and 27 more

[ruchamahabal]

skip_attendance_in_checkins is already covered in tests. Not adding tests for comments.