refactor: trigger generate schedule when any change made in items table

[noahjacob]

Issue

• When changing any field in the items table, the user would need to click on generate schedule to get the new schedule with the appropriate changes.

Changes

• Generate schedule now automatically triggers when making changes in fields like serial_no, sales_person, etc.

Closes - #29564

[codecov]

Codecov Report

Merging #29874 (319545e) into develop (96fc6ad) will decrease coverage by 0.18%.
The diff coverage is 91.66%.

@@             Coverage Diff             @@
##           develop   #29874      +/-   ##
===========================================
- Coverage    60.89%   60.71%   -0.19%     
===========================================
  Files         1083     1083              
  Lines        69111    69122      +11     
===========================================
- Hits         42085    41965     -120     
- Misses       27026    27157     +131     

Impacted Files	Coverage Δ
...ctype/maintenance_schedule/maintenance_schedule.py	86.47% <91.66%> (+0.63%)	⬆️
...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%> (-23.73%)	⬇️
...ext/accounts/report/balance_sheet/balance_sheet.py	36.36% <0.00%> (-21.82%)	⬇️
...xt/stock/report/stock_analytics/stock_analytics.py	80.19% <0.00%> (-10.90%)	⬇️
...unts/report/purchase_register/purchase_register.py	70.39% <0.00%> (-9.87%)	⬇️
...em_wise_sales_register/item_wise_sales_register.py	51.58% <0.00%> (-9.51%)	⬇️
...saction/incorrect_balance_qty_after_transaction.py	88.37% <0.00%> (-9.31%)	⬇️
...urity_shortfall/process_loan_security_shortfall.py	93.75% <0.00%> (-6.25%)	⬇️
...pnext/setup/doctype/sales_partner/sales_partner.py	65.21% <0.00%> (-4.35%)	⬇️
... and 37 more