This update simplifies the way payment lines are handled within the restaurant POS module. The team has switched to a more modern naming convention (camelCase) for payment methods, improving code clarity and maintainability. This change ensures the system continues to function smoothly and efficiently.

In this commit:
- Use the new method names in the payment adjustment flow.
- Replace deprecated snake_case methods with their camelCase equivalents for payment lines, payment terminals, and order totals.

Task:6049128