Raise for unseen categories when materializing from an existing `ModelSpec`#341

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MatthiasSchmidtblaicherQC merged 7 commits intotabmat-v4from unseen-levels-in-formula

Jan 25, 2024

+78-5

Commits on Jan 22, 2024

Commits on Jan 23, 2024

Properly handle missings when checking for unseen
stanmart
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Commits on Jan 25, 2024