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/models/refresh_token.py

@@ -0,0 +1,27 @@
+import uuid
+from datetime import datetime, timezone
+
+from sqlalchemy import Boolean, DateTime, ForeignKey, Index, String
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.database import Base
+
+
+def _now() -> datetime:
+    return datetime.now(timezone.utc)
+
+
+class RefreshToken(Base):
+    __tablename__ = "refresh_tokens"
+    __table_args__ = (Index("idx_refresh_tokens_user_id", "user_id"),)
+
+    id: Mapped[uuid.UUID] = mapped_column(primary_key=True, default=uuid.uuid4)
+    user_id: Mapped[uuid.UUID] = mapped_column(
+        ForeignKey("users.id", ondelete="CASCADE"), nullable=False
+    )
+    token_hash: Mapped[str] = mapped_column(String(255), unique=True, nullable=False)
+    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
+    revoked: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), default=_now)
+
+    user: Mapped["User"] = relationship(back_populates="refresh_tokens")