Fix/workspace health type (#4053)

* fix: memory issue with truncate command

* fix: LINK doesn't have any default value

* fix: Cannot convert LINK to column type.

* fix: handle old column type and add a warn to fix them manually

packages/twenty-server/src/metadata/field-metadata/utils/generate-default-value.ts

@@ -17,6 +17,11 @@ export function generateDefaultValue(
         firstName: '',
         lastName: '',
       };
+    case FieldMetadataType.LINK:
+      return {
+        url: '',
+        label: '',
+      };
     default:
       return null;
   }