Bugfixes and improved alignment with architecture blueprint

internal/domain/domain.go

@@ -43,11 +43,13 @@ const (
 
 // RunRequest represents a request to generate a single artifact.
 type RunRequest struct {
-	ProfileID string
-	Inputs    map[string]ArtifactRef
-	Vars      map[string]string
-	Model     *ModelTarget
-	Metadata  map[string]string
+	ProfileID      string
+	ProfileVersion string
+	Inputs         map[string]ArtifactRef
+	Vars           map[string]string
+	Model          *ModelTarget
+	Validation     *OutputContract
+	Metadata       map[string]string
 }
 
 // RunResult represents the complete result of a prompt execution run.