Replace node definition string-based lookups with DefinitionIdentifier instances (#3451)

* create definition identifier and integrate it

* Bug fixes and code review

* formatting

* Fix migrations

* Fix remove handles migration

* formatting

* Fix test

* Fix tests 2

* fix deserialization

* Code review

* Small fixes

* Consolidate 'Morph' node migrations

* Add old SamplePointsNode name to migrations list

* Fix tests

* Unrelated small fix

* Fix migration crashes

* Fix tests

* Final code review

* fmt

* Add metadata

---------

Co-authored-by: Keavon Chambers <keavon@keavon.com>

frontend/src/messages.ts

@@ -100,12 +100,10 @@ export class UpdateNodeGraphTransform extends JsMessage {
 	readonly transform!: NodeGraphTransform;
 }
 
-const NodeDescriptions = Transform(({ obj }) => new Map(obj.nodeDescriptions));
-
 export class SendUIMetadata extends JsMessage {
-	@NodeDescriptions
-	readonly nodeDescriptions!: Map<string, string>;
-	@Type(() => FrontendNode)
+	@Transform(({ obj }) => new Map(obj.nodeDescriptions))
+	readonly nodeDescriptions!: Map<DefinitionIdentifier, string>;
+
 	readonly nodeTypes!: FrontendNodeType[];
 }
 
@@ -222,10 +220,12 @@ export class FrontendNode {
 
 	readonly canBeLayer!: boolean;
 
-	readonly reference!: string | undefined;
+	readonly reference!: DefinitionIdentifier | undefined;
 
 	readonly displayName!: string;
 
+	readonly implementationName!: string;
+
 	readonly primaryInput!: FrontendGraphInput | undefined;
 
 	readonly exposedInputs!: FrontendGraphInput[];
@@ -251,6 +251,8 @@ export class FrontendNode {
 }
 
 export class FrontendNodeType {
+	readonly identifier!: DefinitionIdentifier;
+
 	readonly name!: string;
 
 	readonly category!: string;
@@ -258,6 +260,8 @@ export class FrontendNodeType {
 	readonly inputTypes!: string[];
 }
 
+export type DefinitionIdentifier = { type: "Network" | "ProtoNode"; data: string };
+
 export class NodeGraphTransform {
 	readonly scale!: number;
 	readonly x!: number;
@@ -827,7 +831,7 @@ export class UpdateDocumentLayerDetails extends JsMessage {
 export class LayerPanelEntry {
 	id!: bigint;
 
-	reference!: string;
+	reference!: DefinitionIdentifier;
 
 	alias!: string;