origination: First get properties from provider before trying to persist

[JAORMX]

Summary

The incoming origination message might not have all properties set. This
finds the entity from the provider before trying to persist.

Change Type

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• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

Outline how the changes were tested, including steps to reproduce and any relevant configurations.
Attach screenshots if helpful.

Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[jhrozek]

I think the logic is good. Let me fixup the tests as part of reviewing the PR.

[jhrozek]

This works. I updated the tests as part of the review.

[coveralls]

coverage: 53.252% (-0.001%) from 53.253%
when pulling 30c6a8a on origination-get-properties
into ba646eb on main.