* Fix Internal Server Error when removing profile picture (#4257)
This commit addresses the issue where attempting to remove a profile picture resulted in an Internal Server Error.
The fix involves:
* Adding isNullable property to workspace-member avatar;
* Implementing exception handling to handle errors during avatar removal.
* Update packages/twenty-server/src/workspace/workspace-sync-metadata/standard-objects/workspace-member.object-metadata.ts
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Co-authored-by: Charles Bochet <charlesBochet@users.noreply.github.com>
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