Initial commit: Pole Dance Championships App

Full-stack mobile app for pole dance championship management.

Backend: FastAPI + SQLAlchemy 2 (async) + SQLite (dev) / PostgreSQL (prod)
- JWT auth with refresh token rotation
- Championship CRUD with Instagram Graph API sync (APScheduler)
- Registration flow with status management
- Participant list publish with Expo push notifications
- Alembic migrations, pytest test suite

Mobile: React Native + Expo (TypeScript)
- Auth gate: pending approval screen for new members
- Championships list & detail screens
- Registration form with status tracking
- React Query + Zustand + React Navigation v6

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

backend/app/services/participant_service.py

@@ -0,0 +1,49 @@
+import uuid
+
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.crud import crud_championship, crud_participant, crud_registration, crud_user
+from app.models.participant_list import ParticipantList
+from app.models.user import User
+from app.services import notification_service
+
+
+async def publish_participant_list(
+    db: AsyncSession,
+    championship_id: uuid.UUID,
+    organizer: User,
+) -> ParticipantList:
+    pl = await crud_participant.get_by_championship(db, championship_id)
+    if not pl:
+        raise ValueError("Participant list not found — create it first")
+
+    pl = await crud_participant.publish(db, pl)
+
+    championship = await crud_championship.get(db, championship_id)
+    registrations = await crud_registration.list_by_championship(db, championship_id)
+
+    for reg in registrations:
+        user = await crud_user.get(db, reg.user_id)
+        if not user:
+            continue
+
+        if reg.status == "accepted":
+            title = "Congratulations!"
+            body = f"You've been accepted to {championship.title}!"
+        elif reg.status == "rejected":
+            title = "Application Update"
+            body = f"Unfortunately, your application to {championship.title} was not accepted this time."
+        else:
+            title = "Application Update"
+            body = f"You are on the waitlist for {championship.title}."
+
+        await notification_service.send_push_notification(
+            db=db,
+            user=user,
+            title=title,
+            body=body,
+            notif_type=reg.status,
+            registration_id=str(reg.id),
+        )
+
+    return pl