Add ingress configuration for data sources.

[blkt]

Summary

This is necessary to test Data Sources in staging. The lack of it causes a confusing HTTP 464 error with message malformed header: missing HTTP content-type.

Change Type

• 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

Not tested, just a hunch.

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.

[coveralls]

coverage: 55.352%. remained the same
when pulling 733449a on fix/data-source-ingress
into f2d6feb on main.