unit dB not hashable when using decimal as non_int_type when numpy is installed

[PlasmaHH]

Running code like this:

#!/usr/bin/python3
import pint
import decimal

ureg=pint.UnitRegistry( non_int_type = decimal.Decimal )
db=ureg("dB")
uset=set()
uset.add(db)

leads to the error:

AttributeError: 'decimal.Decimal' object has no attribute 'log'. Did you mean: 'logb'?

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/plasmahh/src/python/./uhash.py", line 8, in <module>
    uset.add(db)
  File "/home/plasmahh/.local/lib/python3.11/site-packages/pint/facets/plain/quantity.py", line 283, in __hash__
    self_base = self.to_base_units()
                ^^^^^^^^^^^^^^^^^^^^
  File "/home/plasmahh/.local/lib/python3.11/site-packages/pint/facets/plain/quantity.py", line 566, in to_base_units
    magnitude = self._convert_magnitude_not_inplace(other)
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/plasmahh/.local/lib/python3.11/site-packages/pint/facets/plain/quantity.py", line 472, in _convert_magnitude_not_inplace
    return self._REGISTRY.convert(self._magnitude, self._units, other)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/plasmahh/.local/lib/python3.11/site-packages/pint/facets/plain/registry.py", line 1036, in convert
    return self._convert(value, src, dst, inplace)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/plasmahh/.local/lib/python3.11/site-packages/pint/facets/context/registry.py", line 404, in _convert
    return super()._convert(value, src, dst, inplace)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/plasmahh/.local/lib/python3.11/site-packages/pint/facets/nonmultiplicative/registry.py", line 266, in _convert
    value = self._units[src_offset_unit].converter.to_reference(value, inplace)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/home/plasmahh/.local/lib/python3.11/site-packages/pint/facets/nonmultiplicative/definitions.py", line 115, in to_reference
    value = self.scale * exp(log(self.logbase) * (value / self.logfactor))
                             ^^^^^^^^^^^^^^^^^
TypeError: loop of ufunc does not support argument 0 of type decimal.Decimal which has no callable log method

when numpy is used as numpy.log does not seem to have decimal support. Using math.log instead works:

>>> import decimal,numpy,math
>>> d=decimal.Decimal(1)
>>> math.log(d)
0.0
>>> numpy.log(d)
AttributeError: 'decimal.Decimal' object has no attribute 'log'. Did you mean: 'logb'?

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: loop of ufunc does not support argument 0 of type decimal.Decimal which has no callable log method
>>>