Preserve inherited source origins and transfer evidence

internal/engine/load_metadata.go

@@ -201,6 +201,23 @@ func originContainedBy(candidate, container Origin) bool {
 			return false
 		}
 	}
+	if (len(candidate.contributors) == 0) != (len(container.contributors) == 0) {
+		return false
+	}
+	for _, contributor := range candidate.contributors {
+		found := false
+		for _, available := range container.contributors {
+			if contributor.location == available.location &&
+				slices.Equal(contributor.source.segments, available.source.segments) &&
+				sameInheritanceTrace(contributor.trace, available.trace) {
+				found = true
+				break
+			}
+		}
+		if !found {
+			return false
+		}
+	}
 	return true
 }