NIAD-1456: GP2GP Adaptor now handles empty Access Structure Record

[chiaramapellimt]

What

GP2GP Adaptor now handles empty Access Structure Record.

Why

During a transfer from an NME to an incumbent, if there is no clinical data, then the adaptor should stop the transfer before it reaches the incumbent.

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• [ X ] New feature (non-breaking change which adds functionality)
• Internal change (non-breaking change with no effect on the functionality affecting end users)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• I have performed a self-review of my code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have updated the Changelog with details of my change in the UNRELEASED section if this change will affect end users

[github-actions]

Looks good. All 2 mutations in this change were killed.

class	surviving	killed
💯uk.nhs.adaptors.gp2gp.ehr.mapper.EhrExtractMapper	0	2

See https://pitest.org

• Arcmutate licence valid until 2026-07-16 (yyyy/mm/dd) (non-commercial use only)
• Project uses Spring, but the Arcmutate Spring plugin is not present.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud