Fix change tracker count desync on error (#1555)

* Add TS types

* Ensure changeTracker works after exceptions

Wraps all code between before/after change calls in try/finally blocks

src/types/litegraph-augmentation.d.ts

@@ -1,6 +1,7 @@
 import '@comfyorg/litegraph'
 import type { ComfyNodeDef } from '@/types/apiTypes'
 import type { LLink } from '@comfyorg/litegraph'
+import type { NodeId } from './comfyWorkflow'
 
 /**
  *  ComfyUI extensions of litegraph
@@ -26,8 +27,17 @@ declare module '@comfyorg/litegraph' {
     onExecuted?(output: any): void
     onNodeCreated?(this: LGraphNode): void
     setInnerNodes?(nodes: LGraphNode[]): void
+    // TODO: Requires several coercion changes to runtime code.
+    getInnerNodes?() // : LGraphNode[]
+    convertToNodes?(): LGraphNode[]
+    recreate?(): Promise<LGraphNode>
+    refreshComboInNode?(defs: Record<string, ComfyNodeDef>)
     applyToGraph?(extraLinks?: LLink[]): void
     updateLink?(link: LLink): LLink | null
+    onExecutionStart?(): unknown
+
+    index?: number
+    runningInternalNodeId?: NodeId
 
     comfyClass?: string