fix: changes in schedules gets overwritten on save

[noahjacob]

Issue

• Any changes made to the schedule table would get overwritten since generate schedule is called on save.

Fix

• While validating, only call generate schedule if schedule table is empty or of no of visits are changed.

[codecov]

Codecov Report

Merging #27990 (e08a099) into develop (7717b99) will decrease coverage by 0.05%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           develop   #27990      +/-   ##
===========================================
- Coverage    54.40%   54.35%   -0.06%     
===========================================
  Files         1255     1255              
  Lines        67819    67822       +3     
===========================================
- Hits         36900    36867      -33     
- Misses       30919    30955      +36     

Impacted Files	Coverage Δ
...ctype/maintenance_schedule/maintenance_schedule.py	75.65% <100.00%> (-0.12%)	⬇️
erpnext/utilities/product.py	15.94% <0.00%> (-34.79%)	⬇️
erpnext/shopping_cart/product_info.py	32.35% <0.00%> (-20.59%)	⬇️
...e/shopping_cart_settings/shopping_cart_settings.py	66.03% <0.00%> (-1.89%)	⬇️
erpnext/shopping_cart/product_query.py	61.19% <0.00%> (-1.50%)	⬇️
erpnext/accounts/deferred_revenue.py	75.22% <0.00%> (-0.89%)	⬇️
erpnext/stock/reorder_item.py	75.42% <0.00%> (-0.85%)	⬇️
erpnext/selling/doctype/sales_order/sales_order.py	76.39% <0.00%> (-0.75%)	⬇️
erpnext/stock/report/stock_ageing/stock_ageing.py	89.92% <0.00%> (-0.72%)	⬇️
... and 12 more

[noahjacob]

@Mergifyio backport version-13-hotfix

[mergify]

backport version-13-hotfix

🟠 Waiting for conditions

• merged [:pushpin: backport requirement]

[noahjacob]

@Mergifyio backport version-13-pre-release

[mergify]

backport version-13-pre-release

🟠 Waiting for conditions

• merged [:pushpin: backport requirement]

[mergify]

backport version-13-pre-release

✅ Backports have been created

• #27998 fix: changes in schedules gets overwritten on save (backport #27990) has been created for branch version-13-pre-release

[mergify]

backport version-13-hotfix

✅ Backports have been created

• #27999 fix: changes in schedules gets overwritten on save (backport #27990) has been created for branch version-13-hotfix