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>

core/models/stadium.py

@@ -0,0 +1,109 @@
+from django.db import models
+from simple_history.models import HistoricalRecords
+
+
+class Stadium(models.Model):
+    """
+    Stadium/Arena/Venue model.
+    """
+    SURFACE_CHOICES = [
+        ('grass', 'Natural Grass'),
+        ('turf', 'Artificial Turf'),
+        ('ice', 'Ice'),
+        ('hardwood', 'Hardwood'),
+        ('other', 'Other'),
+    ]
+
+    ROOF_TYPE_CHOICES = [
+        ('dome', 'Dome (Closed)'),
+        ('retractable', 'Retractable'),
+        ('open', 'Open Air'),
+    ]
+
+    id = models.CharField(
+        max_length=100,
+        primary_key=True,
+        help_text='Canonical ID (e.g., stadium_nba_los_angeles_lakers)'
+    )
+    sport = models.ForeignKey(
+        'core.Sport',
+        on_delete=models.CASCADE,
+        related_name='stadiums'
+    )
+    name = models.CharField(
+        max_length=200,
+        help_text='Current stadium name'
+    )
+    city = models.CharField(max_length=100)
+    state = models.CharField(
+        max_length=100,
+        blank=True,
+        help_text='State/Province (blank for international)'
+    )
+    country = models.CharField(
+        max_length=100,
+        default='USA'
+    )
+    latitude = models.DecimalField(
+        max_digits=9,
+        decimal_places=6,
+        null=True,
+        blank=True
+    )
+    longitude = models.DecimalField(
+        max_digits=9,
+        decimal_places=6,
+        null=True,
+        blank=True
+    )
+    capacity = models.PositiveIntegerField(
+        null=True,
+        blank=True,
+        help_text='Seating capacity'
+    )
+    surface = models.CharField(
+        max_length=20,
+        choices=SURFACE_CHOICES,
+        blank=True
+    )
+    roof_type = models.CharField(
+        max_length=20,
+        choices=ROOF_TYPE_CHOICES,
+        blank=True
+    )
+    opened_year = models.PositiveSmallIntegerField(
+        null=True,
+        blank=True,
+        help_text='Year stadium opened'
+    )
+    timezone = models.CharField(
+        max_length=50,
+        blank=True,
+        help_text='IANA timezone (e.g., America/Los_Angeles)'
+    )
+    image_url = models.URLField(
+        blank=True,
+        help_text='URL to stadium image'
+    )
+
+    # Metadata
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    # Audit trail
+    history = HistoricalRecords()
+
+    class Meta:
+        ordering = ['sport', 'city', 'name']
+        verbose_name = 'Stadium'
+        verbose_name_plural = 'Stadiums'
+
+    def __str__(self):
+        return f"{self.name} ({self.city})"
+
+    @property
+    def location(self):
+        """Return city, state/country string."""
+        if self.state:
+            return f"{self.city}, {self.state}"
+        return f"{self.city}, {self.country}"