Begin implementing trade management

core/migrations/0009_trade_exchange_id.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.1.2 on 2022-10-17 18:07
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0008_trade'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='trade',
+            name='exchange_id',
+            field=models.CharField(blank=True, max_length=255, null=True),
+        ),
+    ]