Null equivalence - Empty string default value cleaning (#16217)

- on name standard field on custom object (field metadata + db)
- on text standard fields on standard object (db only)

packages/twenty-server/src/engine/metadata-modules/object-metadata/utils/build-default-flat-field-metadatas-for-custom-object.util.ts

@@ -78,12 +78,12 @@ export const buildDefaultFlatFieldMetadatasForCustomObject = ({
     label: 'Name',
     icon: 'IconAbc',
     description: 'Name',
-    isNullable: false,
+    isNullable: true,
     isActive: true,
     isCustom: false,
     isSystem: false,
     isUIReadOnly: false,
-    defaultValue: "''",
+    defaultValue: null,
     viewFilterIds: [],
 
     createdAt,

packages/twenty-server/src/engine/metadata-modules/workspace-migration/workspace-migration.factory.ts

@@ -57,9 +57,6 @@ export class WorkspaceMigrationFactory {
         FieldMetadataType.TEXT,
         {
           factory: this.basicColumnActionFactory,
-          options: {
-            defaultValue: "''",
-          },
         },
       ],
       [FieldMetadataType.NUMERIC, { factory: this.basicColumnActionFactory }],