Intervention model refactoring

* adds UserActionLogEntry model to user/models.py
  * wraps user and timestamp info
  * can be extended for more information in the future
* refactors all filtering and accessing on values

user/admin.py

@@ -1,6 +1,6 @@
 from django.contrib import admin
 
-from user.models import UserNotification, KonovaUserExtension
+from user.models import UserNotification, KonovaUserExtension, UserActionLogEntry
 
 
 class UserNotificationAdmin(admin.ModelAdmin):
@@ -17,5 +17,15 @@ class KonovaUserExtensionAdmin(admin.ModelAdmin):
     ]
 
 
+class UserActionLogEntryAdmin(admin.ModelAdmin):
+    list_display = [
+        "id",
+        "user",
+        "timestamp",
+        "action",
+    ]
+
+
 admin.site.register(UserNotification, UserNotificationAdmin)
 admin.site.register(KonovaUserExtension, KonovaUserExtensionAdmin)
+admin.site.register(UserActionLogEntry, UserActionLogEntryAdmin)