[BUG] Handle optimistic cache deletion operation (#9914)

# Introduction
This PR is highly related to previous optimistic cache refactor:
https://github.com/twentyhq/twenty/pull/9881
Here we've added some logic within the
`triggerUpdateRelationsOptimisticEffect` which will now run if given
recordInput `deletedAt` field is defined.

If deletion, we will iterate over all the fields searching for
`RELATION` for which deletion might implies necessity to detach the
relation

## Known troubleshooting ( also on main )

![image](https://github.com/user-attachments/assets/10ad59cd-e87b-4f26-89df-0a028fcfa518)
We might have to refactor the `prefillRecord` to spread and
overrides`inputValue` over defaultOne as inputValue could be a partial
one for more info please a look to

# Conclusion
Any suggestions are welcomed !
fixes https://github.com/twentyhq/twenty/issues/9580

---------

Co-authored-by: Charles Bochet <charles@twenty.com>

packages/twenty-front/src/modules/object-record/utils/__tests__/computeOptimisticRecordFromInput.test.ts

@@ -179,4 +179,28 @@ describe('computeOptimisticRecordFromInput', () => {
       `"Should never provide relation mutation through anything else than the fieldId e.g companyId"`,
     );
   });
+
+  it('should throw an error if recordInput contains both the relationFieldId and relationField even if null', () => {
+    const cache = new InMemoryCache();
+    const personObjectMetadataItem = generatedMockObjectMetadataItems.find(
+      (item) => item.nameSingular === 'person',
+    );
+    if (!personObjectMetadataItem) {
+      throw new Error('Person object metadata item not found');
+    }
+
+    expect(() =>
+      computeOptimisticRecordFromInput({
+        objectMetadataItems: generatedMockObjectMetadataItems,
+        objectMetadataItem: personObjectMetadataItem,
+        recordInput: {
+          companyId: '123',
+          company: null,
+        },
+        cache,
+      }),
+    ).toThrowErrorMatchingInlineSnapshot(
+      `"Should never provide relation mutation through anything else than the fieldId e.g companyId"`,
+    );
+  });
 });

packages/twenty-front/src/modules/object-record/utils/computeOptimisticRecordFromInput.ts

@@ -91,7 +91,7 @@ export const computeOptimisticRecordFromInput = ({
       continue;
     }
 
-    if (isDefined(recordInputFieldValue)) {
+    if (!isUndefined(recordInputFieldValue)) {
       throw new Error(
         'Should never provide relation mutation through anything else than the fieldId e.g companyId',
       );

packages/twenty-front/src/modules/object-record/utils/sanitizeRecordInput.ts

@@ -34,8 +34,10 @@ export const sanitizeRecordInput = ({
             (field) => field.name === relationIdFieldName,
           );
 
+          const relationIdFieldValue = recordInput[relationIdFieldName];
+
           return relationIdFieldMetadataItem
-            ? [relationIdFieldName, fieldValue?.id ?? null]
+            ? [relationIdFieldName, relationIdFieldValue ?? null]
             : undefined;
         }