Fix orchestration vectorization-related issues

[joelhulen]

Fix orchestration vectorization-related issues

The issue or feature being addressed

Fixes issues caused by Agents having a non-null vectorization property that contains empty values, which can be the case when the agent has inline_context set to true.

Details on the issue fix or feature implementation

Adds safeguards against null values.

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• I started this PR by branching from the head of the default branch
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• I have included unit tests for the issue/feature
• I have included inline docs for my changes, where applicable
• I have successfully run a local build
• I have provided the required update scripts, where applicable
• I have updated relevant docs, where applicable

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