fix: handling not found in pds func

[SamRobinson75684]

Description

there are is more one function that needs to call PDS to check on the data that PDS has so to make things easier we have decided that it would be best if the PDS function manages what happens on error response returned.

https://nhsd-jira.digital.nhs.uk/browse/DTOSS-10515

Context

Type of changes

• Refactoring (non-breaking change)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would change existing functionality)
• Bug fix (non-breaking change which fixes an issue)

Checklist

• I am familiar with the contributing guidelines
• I have followed the code style of the project
• I have added tests to cover my changes
• I have updated the documentation accordingly
• This PR is a result of pair or mob programming

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[github-actions]

Unit Test Results

✔️ Tests 732 / 732 - passed in 13.1s
📝 Coverage 56.03%
📏 3939 / 6914 lines covered 🌿 931 / 1778 branches covered
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✏️ updated for commit a101923

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
1 Accepted issue

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

See analysis details on SonarQube Cloud