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/schemas/__init__.py

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+# Empty __init__.py files to make Python packages

backend/app/schemas/ppr.py

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+from pydantic import BaseModel, EmailStr, validator
+from datetime import datetime
+from typing import Optional
+from enum import Enum
+
+
+class PPRStatus(str, Enum):
+    NEW = "NEW"
+    CONFIRMED = "CONFIRMED"
+    CANCELED = "CANCELED"
+    LANDED = "LANDED"
+    DELETED = "DELETED"
+    DEPARTED = "DEPARTED"
+
+
+class PPRBase(BaseModel):
+    ac_reg: str
+    ac_type: str
+    ac_call: Optional[str] = None
+    captain: str
+    fuel: Optional[str] = None
+    in_from: str
+    eta: datetime
+    pob_in: int
+    out_to: Optional[str] = None
+    etd: Optional[datetime] = None
+    pob_out: Optional[int] = None
+    email: Optional[EmailStr] = None
+    phone: Optional[str] = None
+    notes: Optional[str] = None
+
+    @validator('ac_reg')
+    def validate_registration(cls, v):
+        if not v or len(v.strip()) == 0:
+            raise ValueError('Aircraft registration is required')
+        return v.strip().upper()
+
+    @validator('pob_in')
+    def validate_pob_in(cls, v):
+        if v is not None and v < 0:
+            raise ValueError('POB inbound must be non-negative')
+        return v
+
+    @validator('pob_out')
+    def validate_pob_out(cls, v):
+        if v is not None and v < 0:
+            raise ValueError('POB outbound must be non-negative')
+        return v
+
+
+class PPRCreate(PPRBase):
+    pass
+
+
+class PPRUpdate(BaseModel):
+    ac_reg: Optional[str] = None
+    ac_type: Optional[str] = None
+    ac_call: Optional[str] = None
+    captain: Optional[str] = None
+    fuel: Optional[str] = None
+    in_from: Optional[str] = None
+    eta: Optional[datetime] = None
+    pob_in: Optional[int] = None
+    out_to: Optional[str] = None
+    etd: Optional[datetime] = None
+    pob_out: Optional[int] = None
+    email: Optional[EmailStr] = None
+    phone: Optional[str] = None
+    notes: Optional[str] = None
+
+
+class PPRStatusUpdate(BaseModel):
+    status: PPRStatus
+
+
+class PPRInDBBase(PPRBase):
+    id: int
+    status: PPRStatus
+    landed_dt: Optional[datetime] = None
+    departed_dt: Optional[datetime] = None
+    created_by: Optional[str] = None
+    submitted_dt: datetime
+
+    class Config:
+        from_attributes = True
+
+
+class PPR(PPRInDBBase):
+    pass
+
+
+class PPRInDB(PPRInDBBase):
+    pass
+
+
+# User schemas
+class UserBase(BaseModel):
+    username: str
+
+
+class UserCreate(UserBase):
+    password: str
+
+
+class UserInDBBase(UserBase):
+    id: int
+
+    class Config:
+        from_attributes = True
+
+
+class User(UserInDBBase):
+    pass
+
+
+class UserInDB(UserInDBBase):
+    password: str
+
+
+# Authentication schemas
+class Token(BaseModel):
+    access_token: str
+    token_type: str
+
+
+class TokenData(BaseModel):
+    username: Optional[str] = None
+
+
+# Journal schemas
+class JournalBase(BaseModel):
+    ppr_id: int
+    entry: str
+    user: str
+    ip: str
+
+
+class JournalCreate(JournalBase):
+    pass
+
+
+class Journal(JournalBase):
+    id: int
+    entry_dt: datetime
+
+    class Config:
+        from_attributes = True
+
+
+# Airport schemas
+class AirportBase(BaseModel):
+    icao: str
+    iata: Optional[str] = None
+    name: str
+    country: str
+
+
+class Airport(AirportBase):
+    class Config:
+        from_attributes = True
+
+
+# Aircraft schemas
+class AircraftBase(BaseModel):
+    icao24: Optional[str] = None
+    registration: Optional[str] = None
+    manufacturericao: Optional[str] = None
+    typecode: Optional[str] = None
+    manufacturername: Optional[str] = None
+    model: Optional[str] = None
+    clean_reg: Optional[str] = None
+
+
+class Aircraft(AircraftBase):
+    class Config:
+        from_attributes = True