fix: track migrations; installs apply them instead of generating them

The *migrations/* ignore rule is removed. appsettings, computes and
logs pin default_auto_field to AutoField, so makemigrations --check
reports no pending BigAutoField migrations and existing installs need
no schema change.

The Vagrant provisioning no longer runs makemigrations, which created
install-specific migration files that conflict with the committed
history; it only runs migrate.

appsettings/apps.py

@@ -3,3 +3,4 @@ from django.apps import AppConfig
 
 class AppsettingsConfig(AppConfig):
     name = "appsettings"
+    default_auto_field = "django.db.models.AutoField"