Add v2 relational domain foundations with import run/file models

apps/stats/migrations/0003_playerseason_source_uid_and_more.py

@@ -0,0 +1,25 @@
+# Generated by Django 5.2.12 on 2026-03-13 12:44
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('competitions', '0003_competition_source_uid_season_source_uid_and_more'),
+        ('players', '0006_player_source_uid_and_more'),
+        ('stats', '0002_playerseasonstats_search_indexes'),
+        ('teams', '0002_team_source_uid_team_teams_team_source__940258_idx'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='playerseason',
+            name='source_uid',
+            field=models.CharField(blank=True, max_length=160, null=True, unique=True),
+        ),
+        migrations.AddIndex(
+            model_name='playerseason',
+            index=models.Index(fields=['source_uid'], name='stats_playe_source__57b701_idx'),
+        ),
+    ]