Bugfix/pdl sivilstand fix

[stigus]

This pull request includes several changes to improve the handling of Sivilstand data in the dolly-backend and pdl-forvalter modules. The most important changes involve adding logging, refining date handling in mapping strategies, and ensuring list modifiability in the SivilstandService.

Improvements in logging and data handling:

• apps/dolly-backend/src/main/java/no/nav/dolly/bestilling/pensjonforvalter/PensjonforvalterConsumer.java: Added logging for lagreSamboer method to log the pensjonSamboerRequest when creating a new cohabitation.

Refinements in mapping strategy:

• apps/dolly-backend/src/main/java/no/nav/dolly/bestilling/pensjonforvalter/mapper/PensjonSamboerMappingStrategy.java: Improved date handling by introducing a variable for datoTom and refining the filtering logic to ensure dates are after datoTom. [1] [2]
• apps/dolly-backend/src/test/java/no/nav/dolly/bestilling/pensjonforvalter/mapper/PensjonSamboerMappingStrategyTest.java: Added new test cases to cover multiple Sivilstand scenarios and ensure proper mapping. [1] [2] [3]

Ensuring list modifiability:

• apps/pdl-forvalter/src/main/java/no/nav/pdl/forvalter/service/SivilstandService.java: Ensured that the Sivilstand list is modifiable by converting it to a LinkedList if necessary before adding new elements.