fix(nodes): fix missing generation modes (#4960)

## What type of PR is this? (check all applicable)

- [ ] Refactor
- [ ] Feature
- [x] Bug Fix
- [ ] Optimization
- [ ] Documentation Update
- [ ] Community Node Submission


## Have you discussed this change with the InvokeAI team?
- [x] Yes
- [ ] No, because:

## Description

[fix(nodes): fix missing generation
modes](8615d53e65)

Lax typing on the metadata util functions allowed a typing issue to slip
through. Fixed the lax typing, updated core metadata node.

## Related Tickets & Documents

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- Related Issue #
- Closes #4959 (thanks @coder543)

invokeai/app/invocations/metadata.py

@@ -107,11 +107,16 @@ class MergeMetadataInvocation(BaseInvocation):
         return MetadataOutput(metadata=MetadataField.model_validate(data))
 
 
+GENERATION_MODES = Literal[
+    "txt2img", "img2img", "inpaint", "outpaint", "sdxl_txt2img", "sdxl_img2img", "sdxl_inpaint", "sdxl_outpaint"
+]
+
+
 @invocation("core_metadata", title="Core Metadata", tags=["metadata"], category="metadata", version="1.0.0")
 class CoreMetadataInvocation(BaseInvocation):
     """Collects core generation metadata into a MetadataField"""
 
-    generation_mode: Literal["txt2img", "img2img", "inpaint", "outpaint"] = InputField(
+    generation_mode: Optional[GENERATION_MODES] = InputField(
         default=None,
         description="The generation mode that output this image",
     )

invokeai/frontend/web/src/features/nodes/util/graphBuilders/buildAdHocUpscaleGraph.ts

@@ -7,7 +7,7 @@ import {
   SaveImageInvocation,
 } from 'services/api/types';
 import { REALESRGAN as ESRGAN, SAVE_IMAGE } from './constants';
-import { addCoreMetadataNode } from './metadata';
+import { addCoreMetadataNode, upsertMetadata } from './metadata';
 
 type Arg = {
   image_name: string;
@@ -56,7 +56,8 @@ export const buildAdHocUpscaleGraph = ({
     ],
   };
 
-  addCoreMetadataNode(graph, {
+  addCoreMetadataNode(graph, {});
+  upsertMetadata(graph, {
     esrgan_model: esrganModelName,
   });
 

invokeai/frontend/web/src/features/nodes/util/graphBuilders/metadata.ts

@@ -5,7 +5,7 @@ import { METADATA, SAVE_IMAGE } from './constants';
 
 export const addCoreMetadataNode = (
   graph: NonNullableGraph,
-  metadata: Partial<CoreMetadataInvocation> | JsonObject
+  metadata: Partial<CoreMetadataInvocation>
 ): void => {
   graph.nodes[METADATA] = {
     id: METADATA,