Function resolve_transient_fieldwise 

pub fn resolve_transient_fieldwise(
    request: &TransientFieldwiseRealizationRequest,
    requirements: TransientFieldwiseRealizationRequirements,
    capabilities: &RealizationCapabilities,
) -> Result<ResolvedTransientFieldwiseRealization, Diagnostic>

Resolve one explicit transient Field-wise request without fallback.

Ordinary Domain/Field/capability admission is delegated to resolve_fieldwise. This layer adds exact Relation/state identity checks; it never infers equivalent equations or substitutes equal-valued Fields.

Errors

Returns EQ0807 for an invalid plan, Relation/state identity drift, or any error from ordinary Field-wise capability admission.