feat: add Django web app, CloudKit sync, dashboard, and game_datetime_utc export

Adds the full Django application layer on top of sportstime_parser:
- core: Sport, Team, Stadium, Game models with aliases and league structure
- scraper: orchestration engine, adapter, job management, Celery tasks
- cloudkit: CloudKit sync client, sync state tracking, sync jobs
- dashboard: staff dashboard for monitoring scrapers, sync, review queue
- notifications: email reports for scrape/sync results
- Docker setup for deployment (Dockerfile, docker-compose, entrypoint)

Game exports now use game_datetime_utc (ISO 8601 UTC) instead of
venue-local date+time strings, matching the canonical format used
by the iOS app.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

cloudkit/migrations/0003_alter_cloudkitsyncjob_status.py

@@ -0,0 +1,29 @@
+# Generated manually
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('cloudkit', '0002_add_sync_progress_fields'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='cloudkitsyncjob',
+            name='status',
+            field=models.CharField(
+                choices=[
+                    ('pending', 'Pending'),
+                    ('running', 'Running'),
+                    ('completed', 'Completed'),
+                    ('completed_with_errors', 'Completed with Errors'),
+                    ('failed', 'Failed'),
+                    ('cancelled', 'Cancelled'),
+                ],
+                default='pending',
+                max_length=25,
+            ),
+        ),
+    ]