Report known zero usage when smoke tests do not dispatch

internal/usecase/smoke_tester.go

@@ -57,6 +57,12 @@ func (t *SmokeTester) Run(ctx context.Context, request domain.SmokeTestRequest)
 	}
 	finish := func(err error) (*domain.SmokeTestReport, error) {
 		report.Timing.Duration = nonnegativeDuration(now().UTC().Sub(startedAt))
+		for _, attempt := range report.Attempts {
+			if attempt.Dispatched {
+				return report, err
+			}
+		}
+		report.Usage = noDispatchUsage()
 		return report, err
 	}
 
@@ -163,7 +169,6 @@ func (t *SmokeTester) runInference(
 		if errors.Is(err, ErrAPIKeyRequired) || errors.Is(err, ErrAPIKeyEnvMissing) {
 			report.Reason = domain.SmokeTestReasonRequiredCredentialMissing
 			report.Failure = domain.ExecutionFailureInvalidRequest
-			report.Usage = noDispatchUsage()
 			report.Completed = true
 			return finish(nil)
 		}
@@ -187,13 +192,11 @@ func (t *SmokeTester) runInference(
 	if err != nil {
 		if contextErr := ctx.Err(); contextErr != nil {
 			report.Failure = generation.ClassifyFailure(contextErr)
-			report.Usage = noDispatchUsage()
 			return finish(contextErr)
 		}
 		var capacityErr *CapacityError
 		if errors.As(err, &capacityErr) {
 			report.Failure = domain.ExecutionFailureCapacity
-			report.Usage = noDispatchUsage()
 			report.Completed = true
 			return finish(nil)
 		}