fix(justfile): add makemigrations before migrate in setup/reset-db

When migrations are not committed (src/*/migrations/ is gitignored),
running 'just setup' skips makemigrations and goes straight to migrate.
Without migration files, admin.0001_initial's swappable_dependency to
accounts becomes a no-op, causing InconsistentMigrationHistory errors
when makemigrations is run later.

Fix by adding makemigrations to setup, setup-complete, and reset-db
targets so migrations are always generated before being applied.

justfile

@@ -30,6 +30,7 @@ migrate:
 # Reset database (delete all migrations)
 reset-db:
     uv run python manage.py flush --noinput
+    uv run python manage.py makemigrations
     uv run python manage.py migrate
 
 # Create superuser
@@ -207,6 +208,7 @@ pin-deps:
 setup:
     uv sync
     just pin-deps
+    uv run python manage.py makemigrations
     uv run python manage.py migrate
     uv run python manage.py createcachetable
     uv run python manage.py createsuperuser
@@ -214,6 +216,7 @@ setup:
 # Complete setup including static files
 setup-complete:
     uv sync
+    uv run python manage.py makemigrations
     uv run python manage.py migrate
     uv run python manage.py createcachetable
     uv run python manage.py collectstatic --noinput