feat: add source field with 3 options, fix EventListAPI fallback, add is_eventify_event to API response

- Event.source field updated: eventify, community, partner (radio select in form)
- EventListAPI: fallback to all events when pincode returns < 6
- EventListAPI: include is_eventify_event and source in serializer
- Admin API: add source to list serializer
- Django admin: source in list_display, list_filter, list_editable
- Event form template: proper radio button rendering for source field

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

events/migrations/migrations/0001_initial.py

@@ -0,0 +1,48 @@
+# Generated by Django 4.2.21 on 2025-11-26 22:07
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        ('master_data', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Event',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('created_date', models.DateField(auto_now_add=True)),
+                ('name', models.CharField(max_length=200)),
+                ('description', models.TextField()),
+                ('start_date', models.DateField()),
+                ('end_date', models.DateField()),
+                ('latitude', models.DecimalField(decimal_places=6, max_digits=9)),
+                ('longitude', models.DecimalField(decimal_places=6, max_digits=9)),
+                ('pincode', models.CharField(max_length=10)),
+                ('district', models.CharField(max_length=100)),
+                ('state', models.CharField(max_length=100)),
+                ('place', models.CharField(max_length=200)),
+                ('is_bookable', models.BooleanField(default=False)),
+                ('is_eventify_event', models.BooleanField(default=True)),
+                ('outside_event_url', models.URLField(default='NA')),
+                ('event_status', models.CharField(choices=[('created', 'Created'), ('cancelled', 'Cancelled'), ('pending', 'Pending'), ('completed', 'Completed'), ('postponed', 'Postponed')], default='pending', max_length=250)),
+                ('cancelled_reason', models.TextField(default='NA')),
+                ('event_type', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='master_data.eventtype')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='EventImages',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('is_primary', models.BooleanField(default=False)),
+                ('event_image', models.ImageField(upload_to='event_images')),
+                ('event', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='events.event')),
+            ],
+        ),
+    ]