fixing list query diagnosis antrian

internal/shared/map.go

@@ -0,0 +1,21 @@
+package shared
+
+func MapChildToParent[P any, C any, K comparable](
+	parents []P,
+	children []C,
+	parentKey func(*P) K,
+	childKey func(C) K,
+	attach func(*P, C),
+) {
+	index := make(map[K]*P)
+
+	for i := range parents {
+		index[parentKey(&parents[i])] = &parents[i]
+	}
+
+	for _, c := range children {
+		if p, ok := index[childKey(c)]; ok {
+			attach(p, c)
+		}
+	}
+}