Remove object relation schema from step output (#16428)

Fix https://github.com/twentyhq/core-team-issues/issues/1931

On trigger database event and step record crud, we still display the
full object for relation in the variable picker (Account Owner in
screenshot).
<img width="259" height="189" alt="Capture d’écran 2025-12-09 à 14 43
06"
src="https://github.com/user-attachments/assets/1d7fdebf-9183-4197-929a-7b7d719c465a"
/>

But as we do not enrich the data anymore, those fields are actually
empty. We should instead display AccountOwnerId and, if the user needs
the full Account owner, a search can be used.
<img width="259" height="189" alt="Capture d’écran 2025-12-09 à 14 42
37"
src="https://github.com/user-attachments/assets/87b46762-3204-4d25-9b6a-077d6b8567bd"
/>

packages/twenty-server/src/engine/workspace-manager/standard-objects-prefill-data/prefill-workflows.ts

@@ -229,7 +229,6 @@ export const prefillWorkflows = async (
                     flatObjectMetadataMaps,
                     flatFieldMetadataMaps,
                   },
-                  depth: 0,
                 }),
               },
               errorHandlingOptions: {
@@ -272,7 +271,6 @@ export const prefillWorkflows = async (
                     flatObjectMetadataMaps,
                     flatFieldMetadataMaps,
                   },
-                  depth: 0,
                 }),
               },
               errorHandlingOptions: {