Initial commit: NextGen PPR System

- FastAPI backend with JWT authentication
- MySQL database with full schema
- Docker Compose orchestration
- CSV data import for 43,208 airports and 519,999 aircraft
- Complete PPR management API
- Modernized replacement for PHP-based system

backend/app/models/__init__.py

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+# Empty __init__.py files to make Python packages

backend/app/models/ppr.py

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+from sqlalchemy import Column, Integer, String, DateTime, Text, Enum as SQLEnum, BigInteger
+from sqlalchemy.sql import func
+from enum import Enum
+from app.db.session import Base
+
+
+class PPRStatus(str, Enum):
+    NEW = "NEW"
+    CONFIRMED = "CONFIRMED"
+    CANCELED = "CANCELED"
+    LANDED = "LANDED"
+    DELETED = "DELETED"
+    DEPARTED = "DEPARTED"
+
+
+class PPRRecord(Base):
+    __tablename__ = "submitted"
+    
+    id = Column(BigInteger, primary_key=True, autoincrement=True)
+    status = Column(SQLEnum(PPRStatus), nullable=False, default=PPRStatus.NEW)
+    ac_reg = Column(String(16), nullable=False)
+    ac_type = Column(String(32), nullable=False)
+    ac_call = Column(String(16), nullable=True)
+    captain = Column(String(64), nullable=False)
+    fuel = Column(String(16), nullable=True)
+    in_from = Column(String(64), nullable=False)
+    eta = Column(DateTime, nullable=False)
+    pob_in = Column(Integer, nullable=False)
+    out_to = Column(String(64), nullable=True)
+    etd = Column(DateTime, nullable=True)
+    pob_out = Column(Integer, nullable=True)
+    email = Column(String(128), nullable=True)
+    phone = Column(String(16), nullable=True)
+    notes = Column(String(2000), nullable=True)
+    landed_dt = Column(DateTime, nullable=True)
+    departed_dt = Column(DateTime, nullable=True)
+    created_by = Column(String(16), nullable=True)
+    submitted_dt = Column(DateTime, nullable=False, server_default=func.current_timestamp())
+
+
+class User(Base):
+    __tablename__ = "users"
+    
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    username = Column(String(50), nullable=False, unique=True, index=True)
+    password = Column(String(255), nullable=False)
+
+
+class Journal(Base):
+    __tablename__ = "journal"
+    
+    id = Column(BigInteger, primary_key=True, autoincrement=True)
+    ppr_id = Column(Integer, nullable=False, index=True)
+    entry = Column(Text, nullable=False)
+    user = Column(Text, nullable=False)
+    ip = Column(Text, nullable=False)
+    entry_dt = Column(DateTime, nullable=False, server_default=func.current_timestamp())
+
+
+class Airport(Base):
+    __tablename__ = "airports"
+    
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    icao = Column(String(4), nullable=False, unique=True, index=True)
+    iata = Column(String(3), nullable=True, index=True)
+    name = Column(String(255), nullable=False)
+    country = Column(String(100), nullable=False)
+    city = Column(String(100), nullable=True)
+    timezone = Column(String(50), nullable=True)
+    latitude = Column(Text, nullable=True)
+    longitude = Column(Text, nullable=True)
+    elevation = Column(Integer, nullable=True)
+    created_at = Column(DateTime, nullable=False, server_default=func.current_timestamp())
+
+
+class Aircraft(Base):
+    __tablename__ = "aircraft"
+    
+    id = Column(Integer, primary_key=True, autoincrement=True)
+    icao24 = Column(String(6), nullable=True)
+    registration = Column(String(25), nullable=True, index=True)
+    manufacturer_icao = Column(String(50), nullable=True)
+    type_code = Column(String(30), nullable=True)
+    manufacturer_name = Column(String(255), nullable=True)
+    model = Column(String(255), nullable=True)
+    clean_reg = Column(String(25), nullable=True, index=True)
+    created_at = Column(DateTime, nullable=False, server_default=func.current_timestamp())
+    updated_at = Column(DateTime, nullable=False, server_default=func.current_timestamp())