fix: getEmbeddingZeroVector calls

[cygaar]

Relates to:

#677 made some changes to getEmbeddingZeroVector which need to be adjusted in order to get builds working again

Risks

Low

Background

What does this PR do?

What kind of change is this?

Bug fix

Documentation changes needed?

Testing

Where should a reviewer start?

Detailed testing steps

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
packages/core/src/knowledge.ts	0.00%	1 Missing ⚠️
packages/core/src/memory.ts	0.00%	1 Missing ⚠️

Files with missing lines	Coverage Δ
packages/core/src/knowledge.ts	0.00% <0.00%> (ø)
packages/core/src/memory.ts	0.00% <0.00%> (ø)

... and 3 files with indirect coverage changes