__attr attributes on pointer types are lost on save/load #8687

Version and Platform (required):

• Binary Ninja Version: 6.1.10984-dev
• Edition: Commercial
• OS: macOS
• OS Version: 27.0.1 (26A434)
• CPU Architecture: arm64

Bug Description:
In various cases when saving and loading, __attr attributes are lost on pointer and reference types.

Steps To Reproduce:
Run the following reproducer. (This uses a TypeArchive for simplicity, but the same behavior occurs when when defining a type in a database and saving and loading.)

from binaryninja import Platform, TypeParser, TypeArchive
platform = Platform['linux-x86_64']
(qnt, ty), errors = TypeParser.default.parse_type_string('int * __attr("key", "val")', platform)
assert len(errors) == 0
archive = TypeArchive.create('test.bnta', platform)
archive.add_type('test', ty)
print('before archive:', ty)
print('after archive:', archive.get_type_by_name('test'))

Output:

before archive: int32_t* __attr("key", "val")
after archive: int32_t*

Expected Behavior:
The __attr should still be there after archiving.

Additional Information:

• The bug doesn't occur if you replace int * with, say, int (or apparently any type other than a pointer or reference).

• This bug was discovered by AI but I vouch for the report.