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/crud/crud_participant.py

@@ -0,0 +1,62 @@
+import uuid
+from datetime import datetime, timezone
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.participant_list import ParticipantList
+
+
+def _uuid(v: str | uuid.UUID) -> uuid.UUID:
+    return v if isinstance(v, uuid.UUID) else uuid.UUID(str(v))
+
+
+async def get_by_championship(
+    db: AsyncSession, championship_id: str | uuid.UUID
+) -> ParticipantList | None:
+    result = await db.execute(
+        select(ParticipantList).where(
+            ParticipantList.championship_id == _uuid(championship_id)
+        )
+    )
+    return result.scalar_one_or_none()
+
+
+async def upsert(
+    db: AsyncSession,
+    championship_id: uuid.UUID,
+    published_by: uuid.UUID,
+    notes: str | None,
+) -> ParticipantList:
+    existing = await get_by_championship(db, championship_id)
+    if existing:
+        existing.notes = notes
+        existing.published_by = published_by
+        await db.commit()
+        await db.refresh(existing)
+        return existing
+    pl = ParticipantList(
+        championship_id=championship_id,
+        published_by=published_by,
+        notes=notes,
+    )
+    db.add(pl)
+    await db.commit()
+    await db.refresh(pl)
+    return pl
+
+
+async def publish(db: AsyncSession, pl: ParticipantList) -> ParticipantList:
+    pl.is_published = True
+    pl.published_at = datetime.now(timezone.utc)
+    await db.commit()
+    await db.refresh(pl)
+    return pl
+
+
+async def unpublish(db: AsyncSession, pl: ParticipantList) -> ParticipantList:
+    pl.is_published = False
+    pl.published_at = None
+    await db.commit()
+    await db.refresh(pl)
+    return pl