Add configuration source reporting

internal/config/artifact_families.go

@@ -365,10 +365,22 @@ func artifactFamilySource(cfg *PipelineConfig, family string) string {
 		return ""
 	}
 	prefix := "scriptorium.artifact_families." + family + "."
+	var fallback string
 	for _, ownership := range cfg.resolution.ownership {
-		if strings.HasPrefix(ownership.path, prefix) && len(ownership.sources) > 0 {
-			return ownership.sources[0]
+		if !strings.HasPrefix(ownership.path, prefix) || len(ownership.sources) == 0 {
+			continue
 		}
+		for _, source := range ownership.sources {
+			if source != pipelineDefaultOwnershipSource {
+				return source
+			}
+			if fallback == "" {
+				fallback = source
+			}
+		}
+	}
+	if fallback != "" {
+		return fallback
 	}
 	return pipelineDefaultOwnershipSource
 }