Replace validator contracts with raw output validation

internal/framework/contracts/contracts_test.go

@@ -577,20 +577,15 @@ func (validator fakeValidator) Name() string {
 	return validator.name
 }
 
-func (validator fakeValidator) Validate(ctx context.Context, req ValidationRequest) (ValidationResult, error) {
-	decisions := make([]ValidationDecision, 0, len(req.Candidates))
-	for _, candidate := range req.Candidates {
-		decisions = append(decisions, ValidationDecision{
-			CandidateIndex: candidate.Index,
-			Approved:       true,
-			ReasonCode:     "accepted",
-			Message:        "candidate accepted",
-		})
-	}
+func (validator fakeValidator) ExecutionClass() ExecutionClass {
+	return ExecutionClassDeterministic
+}
 
+func (validator fakeValidator) Validate(ctx context.Context, req ValidationRequest) (ValidationResult, error) {
 	return ValidationResult{
-		ValidatorName: validator.name,
-		Decisions:     decisions,
+		Approved:   true,
+		ReasonCode: "accepted",
+		Message:    "output accepted",
 	}, nil
 }