Ved 982 updated dpsfull batch scenario

[FimranNHS]

Summary

Batch File Enhancements

• Added a new scenario for files received from the DPS side.
  This scenario validates that:
• Immunisation events are correctly created in the Imms Event table with accurate data.
• No records are created in the Delta table for this flow.
• Refactored the patient age calculation logic to ensure it is derived correctly from both:
• The CREATE event payload
• The UPDATE event payload
  This ensures consistent and accurate age validation across all event types.

Reviews Required

• Dev
• Test
• Tech Author
• Product Owner

Review Checklist

ℹ️ This section is to be filled in by the reviewer.

• I have reviewed the changes in this PR and they fill all of the acceptance criteria of the ticket.
• If there were infrastructure, operational, or build changes, I have made sure there is sufficient evidence that the changes will work.
• If there were changes that are outside of the regular release processes e.g. account infrastructure to setup, manual setup for external API integrations, secrets to set, then I have checked that the developer has flagged this to the Tech Lead as release steps.
• I have checked that no Personal Identifiable Data (PID) is logged as part of the changes.

[github-actions]

This branch is working on a ticket in the NHS England VED JIRA Project. Here's a handy link to the ticket:

VED-982

[avshetty1980]

Could you please add a summary to the PR on what the update to the DPSFull batch is and perhaps in the title too?

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarQube Cloud