Rename ganaciasNetas.sql to R2_ganaciasNetas.sql and add validation f…

[Jrgil20]

This pull request includes changes to the R2_ganaciasNetas.sql file, which was renamed from ganaciasNetas.sql. The changes introduce new logic to handle date validations within the script.

Date validation logic:

• Added a conditional statement to check if fecha_fin is greater than the current date and set it to the current date if true. This is followed by raising an exception to indicate that net earnings are calculated up to today.
• Added a conditional statement to raise a notice if fecha_inicio is greater than the current date, indicating that calculation cannot proceed yet.…or fecha_fin and fecha_inicio