🏓 Initial ServeSync demo build

- FastAPI backend with PostgreSQL + Redis
- 4 core features: Registration, Courts, Matchmaking, Tournament
- Double elimination tournament with bracket visualization
- ELO-based matchmaking (Stage 1 Open, Stage 2 Skill-Based)
- Real-time WebSocket updates
- TV Screen display for courts
- Vue 3 + Tailwind CSS frontend
- Seed data: 12 players, 4 courts, active matches, tournament in progress
- Docker compose stack with Nginx reverse proxy

backend/app/models/booking.py

@@ -0,0 +1,33 @@
+from sqlalchemy import Column, Integer, ForeignKey, DateTime, Float, String, Enum, Boolean
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from app.database import Base
+import enum
+
+
+class BookingStatus(str, enum.Enum):
+    PENDING = "pending"
+    CONFIRMED = "confirmed"
+    IN_PROGRESS = "in_progress"
+    COMPLETED = "completed"
+    CANCELLED = "cancelled"
+
+
+class Booking(Base):
+    __tablename__ = "bookings"
+
+    id = Column(Integer, primary_key=True, index=True)
+    player_id = Column(Integer, ForeignKey("players.id"), nullable=False)
+    court_id = Column(Integer, ForeignKey("courts.id"), nullable=False)
+    start_time = Column(DateTime(timezone=True), nullable=False)
+    end_time = Column(DateTime(timezone=True), nullable=False)
+    duration_hours = Column(Float, default=1.0)
+    total_cost = Column(Float, default=0.0)
+    status = Column(Enum(BookingStatus), default=BookingStatus.CONFIRMED)
+    is_match_booking = Column(Boolean, default=False)
+    notes = Column(String(500))
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+
+    # Relationships
+    player = relationship("Player", back_populates="bookings")
+    court = relationship("Court", back_populates="bookings")