chore: few improvements on example project

Author: jbarreau

src/_example/django/django_demo/app/forest/custom_datasources/typicode.py

@@ -1,4 +1,4 @@
-from typing import Any, Dict, List, Self
+from typing import Any, Dict, List
 
 from aiohttp import ClientSession
 from forestadmin.agent_toolkit.utils.context import User
@@ -10,6 +10,7 @@
 from forestadmin.datasource_toolkit.interfaces.query.filter.paginated import PaginatedFilter
 from forestadmin.datasource_toolkit.interfaces.query.filter.unpaginated import Filter
 from forestadmin.datasource_toolkit.interfaces.query.projections import Projection
+from typing_extensions import Self
 
 
 class TypicodeCollection(Collection):

src/_example/django/django_demo/app/management/commands/sqlalchemy_init.py

@@ -78,7 +78,7 @@ def _populate_addresses(session, customers: List[Customer]) -> List[Address]:
 
     for _ in range(0, 1000):
         address = Address(
-            street=fake.street_address(), city=fake.city(), country=fake.country(), zip_code=fake.postcode()
+            street=fake.street_address(), city=fake.city(), country=fake.country(), zip_code=fr_fake.postcode()
         )
         known_customer: Set[Customer] = set()
         for _ in range(1, random.randint(2, 4)):