chore: set up wait_for_db management command scaffold

Introduce a skeleton for the 'wait_for_db' management command within the core app. This command will ensure robust deployment processes by preventing the application from starting before the database is ready, thus mitigating race conditions. This commit lays the groundwork for the upcoming implementation that will handle database connectivity checks.
https://docs.djangoproject.com/en/5.0/howto/custom-management-commands/

app/app/settings.py

@@ -37,6 +37,7 @@
     'django.contrib.sessions',
     'django.contrib.messages',
     'django.contrib.staticfiles',
+    'core',
 ]
 
 MIDDLEWARE = [

app/core/admin.py

@@ -0,0 +1,3 @@
+from django.contrib import admin
+
+# Register your models here.

app/core/apps.py

@@ -0,0 +1,6 @@
+from django.apps import AppConfig
+
+
+class CoreConfig(AppConfig):
+    default_auto_field = 'django.db.models.BigAutoField'
+    name = 'core'

app/core/management/commands/wait_for_db.py

@@ -0,0 +1,10 @@
+"""
+Django command to wait for the database to be available.
+"""
+from django.core.management.base import BaseCommand
+
+class Command(BaseCommand):
+    """Django command to wait for database."""
+
+    def handle(self, *args, **options):
+        pass

app/core/models.py

@@ -0,0 +1,3 @@
+from django.db import models
+
+# Create your models here.