CheckedPMap.create does not forward ignore_extra to nested CheckedType keys/values

[pramodavansaber]

Description

CheckedPMap.create(..., ignore_extra=True) does not forward ignore_extra to the nested key/value CheckedType.create calls, so extra fields in a nested checked value still raise even though ignore_extra=True was requested. CheckedPVector / CheckedPSet thread ignore_extra correctly; CheckedPMap is the one collection that drops it.

Reproduction

from pyrsistent import CheckedPMap, PRecord, field

class Rec(PRecord):
    a = field()

class M(CheckedPMap):
    __key_type__ = str
    __value_type__ = Rec

M.create({"k": {"a": 1, "extra": 2}}, ignore_extra=True)
# AttributeError: 'extra' is not among the specified fields for Rec

Expected vs actual

• expected: ignore_extra=True is honored (extra field dropped), as it is for CheckedPVector/CheckedPSet
• actual: AttributeError is raised

Root cause

CheckedPMap.create calls checked_key_type.create(key) / checked_value_type.create(value) without passing ignore_extra=ignore_extra. The sibling helper _checked_type_create (used by the vector/set) threads it through; CheckedPMap.create should do the same.