Activity as standard object (#6219)

In this PR I layout the first steps to migrate Activity to a traditional
Standard objects

Since this is a big transition, I'd rather split it into several
deployments / PRs

<img width="1512" alt="image"
src="https://github.com/user-attachments/assets/012e2bbf-9d1b-4723-aaf6-269ef588b050">

---------

Co-authored-by: Charles Bochet <charles@twenty.com>
Co-authored-by: bosiraphael <71827178+bosiraphael@users.noreply.github.com>
Co-authored-by: Weiko <corentin@twenty.com>
Co-authored-by: Faisal-imtiyaz123 <142205282+Faisal-imtiyaz123@users.noreply.github.com>
Co-authored-by: Prateek Jain <prateekj1171998@gmail.com>

packages/twenty-front/src/modules/object-metadata/utils/getLabelIdentifierFieldValue.ts

@@ -16,6 +16,14 @@ export const getLabelIdentifierFieldValue = (
     return `${record.name?.firstName ?? ''} ${record.name?.lastName ?? ''}`;
   }
 
+  if (objectNameSingular === CoreObjectNameSingular.NoteTarget) {
+    return record.note?.title ?? '';
+  }
+
+  if (objectNameSingular === CoreObjectNameSingular.TaskTarget) {
+    return record.task?.title ?? '';
+  }
+
   if (isDefined(labelIdentifierFieldMetadataItem?.name)) {
     return String(record[labelIdentifierFieldMetadataItem.name]);
   }