from typing import Literal, Optional from pydantic import BaseModel, Field class DocumentInput(BaseModel): client_name: str = Field(..., min_length=1) provider_name: str = Field(..., min_length=1) payment_type: Literal["hourly", "fixed", "other"] hourly_rate_gbp: Optional[float] = Field(None, gt=0) fixed_fee_gbp: Optional[float] = Field(None, gt=0) include_confidentiality: bool = False governing_law: str