Avoid deserialization error for paths above the root (#10789)
## Summary
Closes https://github.com/astral-sh/uv/issues/10777
## Test Plan
Copied over this lockfile:
```toml
version = 1
requires-python = ">=3.12"
resolution-markers = [
"sys_platform == 'win32'",
"sys_platform != 'win32'",
]
[[package]]
name = "pyasn1"
version = "0.6.1"
source = { registry = "https://pypi.org/simple" }
sdist = { url = "01f1a64245/pyasn1-0.6.1.tar.gz", hash = "sha256:6f580d2bdd84365380830acf45550f2511469f673cb4a5ae3857a3170128b034", size = 145322 }
wheels = [
{ url = "d6a797abb1/pyasn1-0.6.1-py3-none-any.whl", hash = "sha256:0d632f46f2ba09143da3a8afe9e33fb6f92fa2320ab7e886e2d0f7672af84629", size = 83135 },
]
[[package]]
name = "pyasn1-modules"
version = "0.4.1"
source = { registry = "https://pypi.org/simple" }
dependencies = [
{ name = "pyasn1" },
]
sdist = { url = "6afbf0d507/pyasn1_modules-0.4.1.tar.gz", hash = "sha256:c28e2dbf9c06ad61c71a075c7e0f9fd0f1b0bb2d2ad4377f240d33ac2ab60a7c", size = 310028 }
wheels = [
{ url = "bc88a67119/pyasn1_modules-0.4.1-py3-none-any.whl", hash = "sha256:49bfa96b45a292b711e986f222502c1c9a5e1f4e568fc30e2574a6c7d07838fd", size = 181537 },
]
[[package]]
name = "python-ldap"
version = "3.4.4"
source = { registry = "https://pypi.org/simple" }
resolution-markers = [
"sys_platform != 'win32'",
]
dependencies = [
{ name = "pyasn1", marker = "sys_platform != 'win32'" },
{ name = "pyasn1-modules", marker = "sys_platform != 'win32'" },
]
sdist = { url = "1eeb4025dc/python-ldap-3.4.4.tar.gz", hash = "sha256:7edb0accec4e037797705f3a05cbf36a9fde50d08c8f67f2aef99a2628fab828", size = 377889 }
[[package]]
name = "python-ldap"
version = "3.4.4"
source = { path = "../../../uti/Python/python_ldap-3.4.4-cp312-cp312-win_amd64.whl" }
resolution-markers = [
"sys_platform == 'win32'",
]
dependencies = [
{ name = "pyasn1", marker = "sys_platform == 'win32'" },
{ name = "pyasn1-modules", marker = "sys_platform == 'win32'" },
]
wheels = [
{ filename = "python_ldap-3.4.4-cp312-cp312-win_amd64.whl", hash = "sha256:94d2ca2b3ced81c9d89aa5c79d4965d03053e1ffdcfae73e9fac85d25b692e85" },
]
[package.metadata]
requires-dist = [
{ name = "pyasn1", specifier = ">=0.3.7" },
{ name = "pyasn1-modules", specifier = ">=0.1.5" },
]
[[package]]
name = "uv-test"
version = "1.0"
source = { virtual = "." }
dependencies = [
{ name = "python-ldap", version = "3.4.4", source = { registry = "https://pypi.org/simple" }, marker = "sys_platform != 'win32'" },
{ name = "python-ldap", version = "3.4.4", source = { path = "../../../uti/Python/python_ldap-3.4.4-cp312-cp312-win_amd64.whl" }, marker = "sys_platform == 'win32'" },
]
[package.metadata]
requires-dist = [
{ name = "python-ldap", marker = "sys_platform != 'win32'" },
{ name = "python-ldap", marker = "sys_platform == 'win32'", path = "../../../../../../../../../../../../uti/Python/python_ldap-3.4.4-cp312-cp312-win_amd64.whl" },
]
```
Verified that `cargo run sync --frozen` installs `python-ldap` from
PyPI, without erroring.
07e1e85c5d