import math
from decimal import Decimal
from typing import Any

def clean_nans(obj: Any) -> Any:
    """
    Recursive utility to replace NaN, Infinity, and -Infinity with None
    to ensure JSON compatibility.
    Standards Moez Elbey: Missing data => null/None.
    """
    if isinstance(obj, float):
        if math.isnan(obj) or math.isinf(obj):
            return None
        return obj
    elif isinstance(obj, Decimal):
        return float(obj)
    elif isinstance(obj, dict):
        return {k: clean_nans(v) for k, v in obj.items()}
    elif isinstance(obj, list):
        return [clean_nans(v) for v in obj]
    return obj