def decimal_encoder(dec_value: Decimal) -> Union[int, float]:
    """
    Encodes a Decimal as int of there's no exponent, otherwise float

    This is useful when we use ConstrainedDecimal to represent Numeric(x,0)
    where a integer (but not int typed) is used. Encoding this as a float
    results in failed round-tripping between encode and parse.
    Our Id type is a prime example of this.

    >>> decimal_encoder(Decimal("1.0"))
    1.0

                ```
                """
            ),
        ] = "0.1.0",
        openapi_url: Annotated[
            Optional[str],
            Doc(
                """
                The URL where the OpenAPI schema will be served from.

                If you set it to `None`, no OpenAPI schema will be served publicly, and
                the default automatic endpoints `/docs` and `/redoc` will also be