Architectural improvements in the http adapter

internal/adapter/http/handler.go

@@ -93,7 +93,7 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			Size:        res.Artifact.Size,
 			Hash:        res.Artifact.Hash,
 		},
-		Validation: res.Validation,
+		Validation: mapValidation(res.Validation),
 		Metadata: metadataDTO{
 			ProfileID:      res.ProfileID,
 			ProfileVersion: res.ProfileVersion,
@@ -101,14 +101,29 @@ func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 			Endpoint:       res.Endpoint,
 			InputHashes:    res.InputHashes,
 			PromptHash:     res.PromptHash,
-			Usage:          res.Usage,
-			StartTime:      res.StartTime,
-			EndTime:        res.EndTime,
+			Usage: tokenUsageDTO{
+				PromptTokens:     res.Usage.PromptTokens,
+				CompletionTokens: res.Usage.CompletionTokens,
+				TotalTokens:      res.Usage.TotalTokens,
+			},
+			StartTime: res.StartTime,
+			EndTime:   res.EndTime,
 		},
 		RawModelOutput: res.RawOutput,
 	})
 }
 
+func mapValidation(v domain.ValidationResult) validationDTO {
+	return validationDTO{
+		Status:         string(v.Status),
+		Mode:           string(v.Mode),
+		Errors:         v.Errors,
+		SchemaPath:     v.SchemaPath,
+		RepairAttempts: v.RepairAttempts,
+		IsValid:        v.IsValid,
+	}
+}
+
 func mapRunError(err error) (int, string) {
 	switch {
 	case errors.Is(err, profile.ErrProfileNotFound):