further reduce backwards incompatibility

Author: bisgaard-itis

services/api-server/src/simcore_service_api_server/models/domain/groups.py

@@ -4,10 +4,10 @@
 class UsersGroup(BaseModel):
     gid: str
     label: str
-    description: str | None = None
+    description: str = None  # TODO: should be nullable
 
 
 class Groups(BaseModel):
     me: UsersGroup
-    organizations: list[UsersGroup] | None = []
+    organizations: list[UsersGroup] = []  # TODO: should be nullable
     all_: UsersGroup = Field(..., alias="all")

services/api-server/src/simcore_service_api_server/models/schemas/profiles.py

@@ -9,8 +9,12 @@
 
 
 class ProfileCommon(BaseModel):
-    first_name: FirstNameStr | None = Field(None, examples=["James"])
-    last_name: LastNameStr | None = Field(None, examples=["Maxwell"])
+    first_name: FirstNameStr = Field(
+        None, examples=["James"]
+    )  # TODO: should be nullable
+    last_name: LastNameStr = Field(
+        None, examples=["Maxwell"]
+    )  # TODO: should be nullable
 
 
 class ProfileUpdate(ProfileCommon):
@@ -31,12 +35,12 @@ class Profile(ProfileCommon):
     id_: UserID = Field(alias="id")
     login: LowerCaseEmailStr
     role: UserRoleEnum
-    groups: Groups | None = None
-    gravatar_id: str | None = Field(
+    groups: Groups = None  # TODO: should be nullable
+    gravatar_id: str = Field(
         None,
         description="md5 hash value of email to retrieve an avatar image from https://www.gravatar.com",
         max_length=40,
-    )
+    )  # TODO: should be nullable
 
     @field_validator("role", mode="before")
     @classmethod