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/league_structure.py

@@ -0,0 +1,92 @@
+from django.db import models
+from simple_history.models import HistoricalRecords
+
+
+class Conference(models.Model):
+    """
+    Conference within a sport (e.g., Eastern, Western for NBA).
+    """
+    sport = models.ForeignKey(
+        'core.Sport',
+        on_delete=models.CASCADE,
+        related_name='conferences'
+    )
+    canonical_id = models.CharField(
+        max_length=100,
+        blank=True,
+        db_index=True,
+        help_text='Canonical ID from bootstrap JSON (e.g., nba_eastern)'
+    )
+    name = models.CharField(max_length=50)
+    short_name = models.CharField(
+        max_length=10,
+        blank=True,
+        help_text='Short name (e.g., East, West)'
+    )
+    order = models.PositiveSmallIntegerField(
+        default=0,
+        help_text='Display order'
+    )
+
+    # Metadata
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    # Audit trail
+    history = HistoricalRecords()
+
+    class Meta:
+        ordering = ['sport', 'order', 'name']
+        unique_together = ['sport', 'name']
+        verbose_name = 'Conference'
+        verbose_name_plural = 'Conferences'
+
+    def __str__(self):
+        return f"{self.sport.short_name} - {self.name}"
+
+
+class Division(models.Model):
+    """
+    Division within a conference (e.g., Atlantic, Central for NBA East).
+    """
+    conference = models.ForeignKey(
+        Conference,
+        on_delete=models.CASCADE,
+        related_name='divisions'
+    )
+    canonical_id = models.CharField(
+        max_length=100,
+        blank=True,
+        db_index=True,
+        help_text='Canonical ID from bootstrap JSON (e.g., nba_southeast)'
+    )
+    name = models.CharField(max_length=50)
+    short_name = models.CharField(
+        max_length=10,
+        blank=True,
+        help_text='Short name'
+    )
+    order = models.PositiveSmallIntegerField(
+        default=0,
+        help_text='Display order'
+    )
+
+    # Metadata
+    created_at = models.DateTimeField(auto_now_add=True)
+    updated_at = models.DateTimeField(auto_now=True)
+
+    # Audit trail
+    history = HistoricalRecords()
+
+    class Meta:
+        ordering = ['conference', 'order', 'name']
+        unique_together = ['conference', 'name']
+        verbose_name = 'Division'
+        verbose_name_plural = 'Divisions'
+
+    def __str__(self):
+        return f"{self.conference.sport.short_name} - {self.conference.name} - {self.name}"
+
+    @property
+    def sport(self):
+        return self.conference.sport