added optional gender field

src/fiber_package/entity/person.py

@@ -4,7 +4,7 @@ from datetime import date
 
 from fiber_package.base import FiberBaseModel
 from fiber_package.membership_tag import MembershipTag
-from .enums import LanguageOption
+from .enums import LanguageOption, Gender
 from .submodels import Address
 
 class PersonModel(FiberBaseModel):
@@ -17,6 +17,7 @@ class PersonModel(FiberBaseModel):
     full_name: str | None = None  # first_name + infix + last_name
     email: EmailStr
     language: LanguageOption
+    gender: Gender | None
 
     address: Address | None = None
     phone_number: str | None = None