OptionalapiOptionaleffortOptionalpromptThe PromptConfiguration bag of the AIPromptModel row this candidate came from, when it came
from one. Threaded like effortLevel rather than looked up later, because a candidate sourced
from power-rank or model-type has NO prompt-model row and must contribute no override.
OptionalsupportsOptionalvendorOptionalvendor
Represents a model-vendor pair candidate for execution