Fix copypasted primitives inside subgraphs (#8094)

Copying a subgraph which contains primitive nodes would cause the
primitives to fail to initialize. This was caused because they did not
have their `onGraphConfigured` and `onAfterGraphConfigured` callbacks
applied.

There's already a copy of `forEachNode` in
`@/utils/graphTraversalUtil.ts`, but the method is small and I want to
avoid litegraph referencing outside code.

See also #6606, where a similar fix was needed

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8094-Fix-copypasted-primitives-inside-subgraphs-2ea6d73d365081f189f1ea4c9248f5ed)
by [Unito](https://www.unito.io)

src/lib/litegraph/src/LGraphCanvas.ts

@@ -8,6 +8,7 @@ import { useLayoutMutations } from '@/renderer/core/layout/operations/layoutMuta
 import { layoutStore } from '@/renderer/core/layout/store/layoutStore'
 import { LayoutSource } from '@/renderer/core/layout/types'
 import { removeNodeTitleHeight } from '@/renderer/core/layout/utils/nodeSizeUtil'
+import { forEachNode } from '@/utils/graphTraversalUtil'
 
 import { CanvasPointer } from './CanvasPointer'
 import type { ContextMenu } from './ContextMenu'
@@ -4057,6 +4058,8 @@ export class LGraphCanvas implements CustomEventDispatcher<LGraphCanvasEventMap>
     layoutStore.batchUpdateNodeBounds(newPositions)
 
     this.selectItems(created)
+    forEachNode(graph, (n) => n.onGraphConfigured?.())
+    forEachNode(graph, (n) => n.onAfterGraphConfigured?.())
 
     graph.afterChange()
     this.emitAfterChange()