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>

scraper/resources.py

@@ -0,0 +1,55 @@
+"""Import/Export resources for scraper models."""
+from import_export import resources, fields
+from import_export.widgets import ForeignKeyWidget
+
+from core.models import Sport
+from .models import ScraperConfig, ScrapeJob, ManualReviewItem
+
+
+class ScraperConfigResource(resources.ModelResource):
+    sport = fields.Field(
+        column_name='sport',
+        attribute='sport',
+        widget=ForeignKeyWidget(Sport, 'code')
+    )
+
+    class Meta:
+        model = ScraperConfig
+        import_id_fields = ['sport', 'season']
+        fields = [
+            'sport', 'season', 'is_active', 'is_enabled',
+            'scrape_interval_hours', 'primary_source',
+        ]
+        export_order = fields
+
+
+class ScrapeJobResource(resources.ModelResource):
+    sport = fields.Field(attribute='config__sport__code', readonly=True)
+    season = fields.Field(attribute='config__season', readonly=True)
+
+    class Meta:
+        model = ScrapeJob
+        fields = [
+            'id', 'sport', 'season', 'status',
+            'games_found', 'games_new', 'games_updated', 'games_unchanged',
+            'started_at', 'finished_at', 'errors', 'created_at',
+        ]
+        export_order = fields
+
+
+class ManualReviewItemResource(resources.ModelResource):
+    sport = fields.Field(
+        column_name='sport',
+        attribute='sport',
+        widget=ForeignKeyWidget(Sport, 'code')
+    )
+
+    class Meta:
+        model = ManualReviewItem
+        import_id_fields = ['id']
+        fields = [
+            'id', 'sport', 'item_type', 'raw_value', 'matched_value',
+            'status', 'confidence', 'reason', 'source_url',
+            'check_date', 'created_at',
+        ]
+        export_order = fields