1946..196D    ; valid                                  # 4.0  LIMBU DIGIT ZERO..TAI LE LETTER AI
196E..196F    ; disallowed                             # NA   <reserved-196E>..<reserved-196F>
1970..1974    ; valid                                  # 4.0  TAI LE LETTER TONE-2..TAI LE LETTER TONE-6
1975..197F    ; disallowed                             # NA   <reserved-1975>..<reserved-197F>

```python
from typing import Annotated, Literal

from fastapi import FastAPI, Query
from pydantic import BaseModel, Field

app = FastAPI()


class FilterParams(BaseModel):
    limit: int = Field(100, gt=0, le=100)
    offset: int = Field(0, ge=0)
    order_by: Literal["created_at", "updated_at"] = "created_at"
    tags: list[str] = []


@app.get("/items/")