feat: add device registration observation

config/settings.py

@@ -63,6 +63,9 @@ load_dotenv(BASE_DIR / ".env")
 # SECURITY WARNING: keep the secret key used in production secret.
 SECRET_KEY = os.environ.get("DJANGO_SECRET_KEY", "django-insecure-dev-only-change-me")
 AI_KEY_ENCRYPTION_KEY = os.environ.get("AI_KEY_ENCRYPTION_KEY", "")
+DEVICE_IDENTIFIER_PEPPER = os.environ.get("DEVICE_IDENTIFIER_PEPPER", SECRET_KEY)
+DEVICE_SESSION_TTL_SECONDS = env_int("DEVICE_SESSION_TTL_SECONDS", 3600)
+DEVICE_ACTIVITY_UPDATE_SECONDS = env_int("DEVICE_ACTIVITY_UPDATE_SECONDS", 86400)
 
 # SECURITY WARNING: don't run with debug turned on in production!
 DEBUG = env_bool("DJANGO_DEBUG", True)
@@ -158,6 +161,7 @@ INSTALLED_APPS = [
     'allauth.account',
     'rest_framework',
     'apps.users',
+    'apps.licensing',
     'apps.portal',
     'apps.billing',
     'apps.ai',