GHSA-q54r-jf2p-rfr2 - gitoxide gix: untrusted .git/config disables filesystem .git-protection path checks via unfiltered protect_options()

## Summary In the `gix` crate, `Cache::protect_options()` in `gix/src/config/cache/access.rs` reads the three filesystem path-protection settings (`core.protectHFS`, `core.protectNTFS`, and `gitoxide.core.protectWindows`) with the unfiltered `gix_config::File::boolean()` accessor instead of the trust-aware `boolean_filter()` accessor used by every other security-critical config read in the same file. When a repository is opened with reduced trust (an ownership mismatch, which maps `.git/config` sections to `Trust::Reduced`), these protection settings should not be honored from the untrusted repository-local config. Because the trust filter is skipped, an attacker who controls a repository's `.git/config` on a shared filesystem can set `core.protectNTFS = false` and/or `core.protectHFS = false`, disabling the `.git` path-confusion checks that run during checkout, index creation, merge, and tree editing. On case-insensitive filesystems this lets crafted tree entries resolve to the `.git` directory and overwrite hooks or config. ## Root Cause Repositories opened under `Trust::Reduced` install a section filter (`is_trusted`) so that security-relevant settings coming from an untrusted repository-local `.git/config` are ignored. The `Cache` struct stores this filter and applies it throughout `gix/src/config/cache/access.rs` for diff drivers, merge drivers, URL rewrites, scheme permissions, lock timeout, and checkout workers. `protect_options()` is the exception: it reads the path-protection booleans through `self.resolved.boolean(...)`, which delegates to `boolean_filter(key, |_| true)` and therefore accepts values from every section regardless of trust. As a result, an untrusted repository-local setting of `core.protectHFS`/`core.protectNTFS`/`gitoxide.core.protectWindows` overrides the safe defaults, defeating the trust boundary for exactly the controls that are meant to prevent `.git` path-confusion attacks. ```text gix/src/config/cache/access.rs:300 Cache::protec