Austenem/CAT-1086 Fix processed dataset sections

[austenem]

Summary

Update processed dataset files and analysis sections to match updated ingest metadata.

Previously:

• Files section intermittently produced runtime error in cases where the files property was absent.
• Analysis section did not appear when expected.

Design Documentation/Original Tickets

CAT-1086 Jira ticket

CAT-1089 Jira ticket

Screenshots/Video

Local:

On TEST:

Checklist

• Code follows the project's coding standards
  • Lint checks pass locally
  • New CHANGELOG-your-feature-name-here.md is present in the root directory, describing the change(s) in full sentences.
• Unit tests covering the new feature have been added
• All existing tests pass
• Any relevant documentation in JIRA/Confluence has been updated to reflect the new feature
• Any new functionalities have appropriate analytics functionalities added