Chore: omit snapshot property from event payload (#5972)

This PR hides the "snapshot" data from the diff overview we show in the
UI in a change request.

frontend/src/component/changeRequest/ChangeRequest/StrategyTooltipLink/StrategyTooltipLink.test.tsx

@@ -0,0 +1,54 @@
+import { render } from 'utils/testRenderer';
+import { screen, within } from '@testing-library/react';
+import { StrategyDiff } from './StrategyTooltipLink';
+import { IFeatureStrategy } from 'interfaces/strategy';
+import { IChangeRequestUpdateStrategy } from 'component/changeRequest/changeRequest.types';
+
+test('Should not render the `snapshot` property', async () => {
+    const existingStrategy: IFeatureStrategy = {
+        name: 'flexibleRollout',
+        constraints: [],
+        variants: [],
+        parameters: {
+            groupId: 'aaa',
+            rollout: '71',
+            stickiness: 'default',
+        },
+        sortOrder: 0,
+        id: '31572930-2db7-461f-813b-3eedc200cb33',
+        title: '',
+        disabled: false,
+        segments: [],
+    };
+
+    const change: IChangeRequestUpdateStrategy = {
+        id: 39,
+        action: 'updateStrategy' as const,
+        payload: {
+            id: '31572930-2db7-461f-813b-3eedc200cb33',
+            name: 'flexibleRollout',
+            title: '',
+            disabled: false,
+            segments: [],
+            snapshot: existingStrategy,
+            variants: [],
+            parameters: {
+                groupId: 'aaa',
+                rollout: '38',
+                stickiness: 'default',
+            },
+            constraints: [],
+        },
+        createdAt: new Date('2024-01-18T07:58:36.314Z'),
+        createdBy: {
+            id: 1,
+            username: 'admin',
+            imageUrl:
+                'https://gravatar.com/avatar/8c6976e5b5410415bde908bd4dee15dfb167a9c873fc4bb8a81f6f2ab448a918?s=42&d=retro&r=g',
+        },
+    };
+
+    render(<StrategyDiff change={change} currentStrategy={existingStrategy} />);
+
+    expect(screen.queryByText(/snapshot/)).toBeNull();
+});

frontend/src/component/changeRequest/ChangeRequest/StrategyTooltipLink/StrategyTooltipLink.tsx

@@ -42,7 +42,7 @@ export const StrategyDiff: FC<{
             <EventDiff
                 entry={{
                     preData: omit(currentStrategy, 'sortOrder'),
-                    data: changeRequestStrategy,
+                    data: omit(changeRequestStrategy, 'snapshot'),
                 }}
             />
         </StyledCodeSection>