Based on the git diff provided, here's a concise and descriptive commit message:

feat: add passkey authentication and enhance user preferences

- Add passkey login security event type with fingerprint icon
- Include request and site context in email confirmation for backend
- Add user_id exact match filter to prevent incorrect user lookups
- Enable PATCH method for updating user preferences via API
- Add moderation_preferences support to user settings
- Optimize ticket queries with select_related and prefetch_related

This commit introduces passkey authentication tracking, improves user
profile filtering accuracy, and extends the preferences API to support
updates. Query optimizations reduce database hits for ticket listings.

backend/apps/notifications/models.py

@@ -14,6 +14,11 @@ Subscriber model is kept for backward compatibility but is optional.
 from django.conf import settings
 from django.db import models
 
+from apps.core.choices.fields import RichChoiceField
+
+# Import choices to ensure registration on app load
+from . import choices  # noqa: F401
+
 
 class Subscriber(models.Model):
     """
@@ -100,12 +105,6 @@ class NotificationLog(models.Model):
     Audit log of sent notifications.
     """
 
-    class Status(models.TextChoices):
-        PENDING = "pending", "Pending"
-        SENT = "sent", "Sent"
-        DELIVERED = "delivered", "Delivered"
-        FAILED = "failed", "Failed"
-
     user = models.ForeignKey(
         settings.AUTH_USER_MODEL,
         on_delete=models.SET_NULL,
@@ -115,10 +114,11 @@ class NotificationLog(models.Model):
     workflow_id = models.CharField(max_length=100, db_index=True)
     notification_type = models.CharField(max_length=50)
     channel = models.CharField(max_length=20)  # email, push, in_app, sms
-    status = models.CharField(
+    status = RichChoiceField(
+        choice_group="notification_log_statuses",
+        domain="notifications",
         max_length=20,
-        choices=Status.choices,
-        default=Status.PENDING,
+        default="pending",
     )
     payload = models.JSONField(default=dict, blank=True)
     error_message = models.TextField(blank=True)
@@ -144,17 +144,13 @@ class SystemAnnouncement(models.Model):
     System-wide announcements.
     """
 
-    class Severity(models.TextChoices):
-        INFO = "info", "Information"
-        WARNING = "warning", "Warning"
-        CRITICAL = "critical", "Critical"
-
     title = models.CharField(max_length=255)
     message = models.TextField()
-    severity = models.CharField(
+    severity = RichChoiceField(
+        choice_group="announcement_severities",
+        domain="notifications",
         max_length=20,
-        choices=Severity.choices,
-        default=Severity.INFO,
+        default="info",
     )
     action_url = models.URLField(blank=True)
     is_active = models.BooleanField(default=True)
@@ -184,12 +180,6 @@ class Notification(models.Model):
     supporting both in-app and email notification channels.
     """
 
-    class Level(models.TextChoices):
-        INFO = "info", "Info"
-        SUCCESS = "success", "Success"
-        WARNING = "warning", "Warning"
-        ERROR = "error", "Error"
-
     # Who receives the notification
     recipient = models.ForeignKey(
         settings.AUTH_USER_MODEL,
@@ -207,10 +197,11 @@ class Notification(models.Model):
     # What happened
     verb = models.CharField(max_length=255)
     description = models.TextField(blank=True)
-    level = models.CharField(
+    level = RichChoiceField(
+        choice_group="notification_levels",
+        domain="notifications",
         max_length=20,
-        choices=Level.choices,
-        default=Level.INFO,
+        default="info",
     )
     # The object that was acted upon (generic foreign key)
     action_object_content_type = models.ForeignKey(