Apply ruff formatting and fix unused import linting errors

Remove unused imports flagged by ruff (F401), apply ruff format across all
files, and restore members.signals side-effect import with noqa: F401 so the
post_save signal that auto-creates Member profiles continues to fire.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

members/models.py

@@ -54,26 +54,19 @@ class Member(RulesModel):
     @classmethod
     def create(cls, first_name: str, last_name: str, email: str, password: Optional[str] = None, member: Optional["Member"] = None) -> "Member":
         """Creates a new member based on the provided details"""
-        
+
         if member is not None and member.pk is not None:
             member.user.first_name = first_name
             member.user.last_name = last_name
             member.user.email = email
             member.user.username = email
-            
+
             if password is not None and password != "":
                 member.user.set_password(password)
-                
+
         else:
             # First check to see if a user already exists in the system
-            user, created = get_user_model().objects.get_or_create(
-                username=email,
-                defaults={
-                    "first_name": first_name,
-                    "last_name": last_name,
-                    "email": email
-                }
-            )
+            user, created = get_user_model().objects.get_or_create(username=email, defaults={"first_name": first_name, "last_name": last_name, "email": email})
 
             if not created:
                 user.first_name = first_name
@@ -102,11 +95,11 @@ class Member(RulesModel):
 
                 user.set_password(password)
                 member.user = user
-                
+
         if not member.user.is_active:
             member.user.is_active = True
-            
+
         member.user.save()
         member.save()
-        
-        return member
+
+        return member