Update workspace entities to make all TEXT nullable (#16144)

Follow up on #15926

---------

Co-authored-by: Etienne <45695613+etiennejouan@users.noreply.github.com>
Co-authored-by: guillim <guigloo@msn.com>

packages/twenty-server/src/engine/core-modules/user/services/workspace-member-transpiler.service.ts

@@ -75,6 +75,10 @@ export class WorkspaceMemberTranspiler {
 
     const roles = fromRoleEntitiesToRoleDtos(userWorkspaceRoles);
 
+    if (!isDefined(userEmail)) {
+      throw new Error(`Workspace member ${id} has no userEmail`);
+    }
+
     return {
       id,
       name,
@@ -111,6 +115,10 @@ export class WorkspaceMemberTranspiler {
       userEmail,
     } = workspaceMember;
 
+    if (!isDefined(userEmail)) {
+      throw new Error(`Workspace member ${id} has no userEmail`);
+    }
+
     const avatarUrl = userWorkspaceId
       ? this.generateSignedAvatarUrl({
           workspaceId: userWorkspaceId,