TRUNK-6462: Align FulfillerStatus enum with FHIR Task Status codes on platform 2.6.x

[its-kios09]

Description of what I changed

Adding FHIR-aligned statuses to FulfillerStatus enum to better support task/order lifecycle management.

Reference: https://hl7.org/fhir/codesystem-task-status.html

New statuses being added:

• DRAFT
• REQUESTED
• ACCEPTED
• REJECTED
• READY
• CANCELLED
• FAILED
• ENTERED_IN_ERROR

This will allow OpenMRS to better represent the complete lifecycle of orders/tasks in FHIR-compliant ways. DEMO Video

Issue I worked on

see https://openmrs.atlassian.net/browse/TRUNK-6462

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