Serializer doesn't skip NotLoaded attributes (from select: [...] in prepare)

[flowerornament]

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Versions

ash_ai 0.5.0, ash 3.5.7

Issue

Using prepare build(select: [...]) in an action causes the serializer to crash when serializing records with %Ash.NotLoaded{} attribute values.

(FunctionClauseError) no function clause matching in Decimal.to_string/2

Cause

The serializer skips NotLoaded for relationships, calculations, and aggregates, but not for attributes.

Fix

Add the same check for attributes after line 148:

match?(%Ash.Resource.Attribute{}, field) &&
    match?(%Ash.NotLoaded{}, Map.get(record, field.name)) ->
  acc

[flowerornament]

Apologies, claude-code jumped ahead and submitted a PR for this here: #166

On my fork: https://github.com/flowerornament/ash_ai/compare/fix/serializer-notloaded-attributes

I closed the PR for now until someone has a chance to look at this.