FM2-648 fix NPE when querying deceased patient with openmrsPatients n…

[chibongho]

…amed query

Description of what I changed

fix NPE when querying deceased patient with openmrsPatients named query

Testing done:
Verify no NPE when going to: http://localhost:8080/openmrs/ws/fhir2/R4/Patient?_summary=data&_format=json&_query=openmrsPatients&q=test&deceased=true

Issue I worked on

see https://issues.openmrs.org/browse/FM2-648

Checklist: I completed these to help reviewers :)

• My IDE is configured to follow the code style of this project.

  No? Unsure? -> configure your IDE, format the code and add the changes with git add . && git commit --amend

• I have added tests to cover my changes. (If you refactored
  existing code that was well tested you do not have to add tests)

  No? -> write tests and add them to this commit git add . && git commit --amend

• I ran mvn clean package right before creating this pull request and
  added all formatting changes to my commit.

  No? -> execute above command

• All new and existing tests passed.

  No? -> figure out why and add the fix to your commit. It is your responsibility to make sure your code works.

• My pull request is based on the latest changes of the master branch.

  No? Unsure? -> execute command git pull --rebase upstream master

[dkayiwa]

@chibongho did you get a chance to look at the build failures?

[chibongho]

@dkayiwa I haven't had time to div into it yet. It seems unrelated to this change though, as I see the same failures in another PR:

https://github.com/openmrs/openmrs-module-fhir2/actions/runs/11459677696/job/31884705402