[boardgames] Tighten up boardgame lookups

vrobbler/apps/boardgames/migrations/0013_boardgame_publishers.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.2.19 on 2025-11-03 04:41
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('boardgames', '0012_boardgame_bgg_rank'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='boardgame',
+            name='publishers',
+            field=models.ManyToManyField(related_name='board_games', to='boardgames.boardgamepublisher'),
+        ),
+    ]