fix: Metadata Not Being Saved (#4009)

## 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?
- [ ] Yes
- [ ] No, because:

      
## Have you updated all relevant documentation?
- [ ] Yes
- [ ] No


## Description

Metadata was not getting saved coz the accumulator was not plugged in if
watermark or nsfw nodes were turned off.

## Related Tickets & Documents

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- Related Issue #
- Closes #

## QA Instructions, Screenshots, Recordings

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Please provide steps on how to test changes, any hardware or 
software specifications as well as any other pertinent information. 
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## Added/updated tests?

- [ ] Yes
- [ ] No : _please replace this line with details on why tests
      have not been included_

## [optional] Are there any post deployment tasks we need to perform?

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

@@ -312,6 +312,17 @@ export const buildCanvasImageToImageGraph = (
     init_image: initialImage.image_name,
   };
 
+  graph.edges.push({
+    source: {
+      node_id: METADATA_ACCUMULATOR,
+      field: 'metadata',
+    },
+    destination: {
+      node_id: LATENTS_TO_IMAGE,
+      field: 'metadata',
+    },
+  });
+
   // add LoRA support
   addLoRAsToGraph(state, graph, LATENTS_TO_LATENTS);
 

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

@@ -8,7 +8,9 @@ import {
   RangeOfSizeInvocation,
 } from 'services/api/types';
 import { addLoRAsToGraph } from './addLoRAsToGraph';
+import { addNSFWCheckerToGraph } from './addNSFWCheckerToGraph';
 import { addVAEToGraph } from './addVAEToGraph';
+import { addWatermarkerToGraph } from './addWatermarkerToGraph';
 import {
   CLIP_SKIP,
   INPAINT,
@@ -20,8 +22,6 @@ import {
   RANDOM_INT,
   RANGE_OF_SIZE,
 } from './constants';
-import { addNSFWCheckerToGraph } from './addNSFWCheckerToGraph';
-import { addWatermarkerToGraph } from './addWatermarkerToGraph';
 
 /**
  * Builds the Canvas tab's Inpaint graph.

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

@@ -217,6 +217,17 @@ export const buildCanvasTextToImageGraph = (
     clip_skip: clipSkip,
   };
 
+  graph.edges.push({
+    source: {
+      node_id: METADATA_ACCUMULATOR,
+      field: 'metadata',
+    },
+    destination: {
+      node_id: LATENTS_TO_IMAGE,
+      field: 'metadata',
+    },
+  });
+
   // add LoRA support
   addLoRAsToGraph(state, graph, TEXT_TO_LATENTS);
 

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

@@ -322,6 +322,17 @@ export const buildLinearImageToImageGraph = (
     init_image: initialImage.imageName,
   };
 
+  graph.edges.push({
+    source: {
+      node_id: METADATA_ACCUMULATOR,
+      field: 'metadata',
+    },
+    destination: {
+      node_id: LATENTS_TO_IMAGE,
+      field: 'metadata',
+    },
+  });
+
   // add LoRA support
   addLoRAsToGraph(state, graph, LATENTS_TO_LATENTS);
 

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

@@ -206,6 +206,17 @@ export const buildLinearTextToImageGraph = (
     clip_skip: clipSkip,
   };
 
+  graph.edges.push({
+    source: {
+      node_id: METADATA_ACCUMULATOR,
+      field: 'metadata',
+    },
+    destination: {
+      node_id: LATENTS_TO_IMAGE,
+      field: 'metadata',
+    },
+  });
+
   // add LoRA support
   addLoRAsToGraph(state, graph, TEXT_TO_LATENTS);