fix hub key renaming if there are different namings for bk and hkey

[tkiehn]

Description

fix hub key renaming if there are different namings for bk and hkey in the source_model: and the staging-model itself and there is only one source model

When only one source_model is specified inside the staging-macro but the source_model key-namings are differing from the definitions in the staging model the renaming would only happen when there are more than one source-model selected.

Related PR with more context: #239

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Manual testing via skeleton-project.

Checklist:

• I have performed a self-review of my code

[MatheHostel]

Tested with redshift adapter

[remoteworkflow]

Link to workflow summary: https://github.com/ScalefreeCOM/datavault4dbt-ci-cd/actions/runs/10668335468

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RESULTS for Synapse:
✅ dbt-tests
✅ dbt-macro-tests

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RESULTS for Postgres:
✅ dbt-tests
✅ dbt-macro-tests

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RESULTS for BigQuery:
✅ dbt-tests
✅ dbt-macro-tests

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RESULTS for Redshift:
✅ dbt-tests
✅ dbt-macro-tests

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RESULTS for Snowflake:
✅ dbt-tests
✅ dbt-macro-tests

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RESULTS for Exasol:
❌ dbt-tests
❌ dbt-macro-tests