add purchace limitations system for rancher - add incentive plans to rancher entries data

apps/herd/migrations/0017_rancher_ignore_purchase_limit.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.0 on 2025-08-26 07:49
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('herd', '0016_rancher_activity_rancher_heavy_livestock_number_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='rancher',
+            name='ignore_purchase_limit',
+            field=models.BooleanField(default=False, help_text='if its true rancher has not buy limitations'),
+        ),
+    ]