feat: add DRF token authentication support

Add `rest_framework.authtoken` to installed apps and configure
`TokenAuthentication` as an authentication class in the REST framework
settings, enabling token-based API authentication alongside existing
session and basic authentication methods.

mnemosyne/mnemosyne/settings.py

@@ -50,6 +50,7 @@ INSTALLED_APPS = [
     "django.contrib.humanize",
     # Third-party
     "rest_framework",
+    "rest_framework.authtoken",
     "storages",
     "django_neomodel",
     "django_prometheus",
@@ -235,6 +236,7 @@ EMAIL_BACKEND = "django.core.mail.backends.smtp.EmailBackend"
 REST_FRAMEWORK = {
     "DEFAULT_AUTHENTICATION_CLASSES": [
         "rest_framework.authentication.SessionAuthentication",
+        "rest_framework.authentication.TokenAuthentication",
         "rest_framework.authentication.BasicAuthentication",
     ],
     "DEFAULT_PERMISSION_CLASSES": [