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/resources.py

@@ -0,0 +1,49 @@
+"""Import/Export resources for cloudkit models."""
+from import_export import resources, fields
+from import_export.widgets import ForeignKeyWidget
+
+from .models import CloudKitConfiguration, CloudKitSyncState, CloudKitSyncJob
+
+
+class CloudKitConfigurationResource(resources.ModelResource):
+    class Meta:
+        model = CloudKitConfiguration
+        import_id_fields = ['name']
+        fields = [
+            'name', 'environment', 'container_id', 'key_id',
+            'is_active', 'batch_size', 'auto_sync_after_scrape',
+        ]
+        export_order = fields
+        # Exclude private_key for security
+        exclude = ['private_key', 'private_key_path']
+
+
+class CloudKitSyncStateResource(resources.ModelResource):
+    class Meta:
+        model = CloudKitSyncState
+        import_id_fields = ['record_type', 'record_id']
+        fields = [
+            'record_type', 'record_id', 'cloudkit_record_name',
+            'sync_status', 'local_hash', 'remote_change_tag',
+            'last_synced', 'last_error', 'retry_count',
+        ]
+        export_order = fields
+
+
+class CloudKitSyncJobResource(resources.ModelResource):
+    configuration = fields.Field(
+        column_name='configuration',
+        attribute='configuration',
+        widget=ForeignKeyWidget(CloudKitConfiguration, 'name')
+    )
+
+    class Meta:
+        model = CloudKitSyncJob
+        fields = [
+            'id', 'configuration', 'status', 'triggered_by',
+            'started_at', 'finished_at',
+            'records_synced', 'records_created', 'records_updated',
+            'records_deleted', 'records_failed',
+            'error_message', 'created_at',
+        ]
+        export_order = fields