## Why
The Rust GStreamer bindings link GLib's GIO library even when none of the selected plugins imports it. Following only plugin dependencies can omit a library the bindings need.
## What changed
- Export `gio-2.0` pkg-config metadata in the voice SDK.
- Require GIO as a runtime dependency root on Linux, macOS, and Windows, including its transitive dependencies under the existing import checks.
- Reject runtime packages that omit the required GIO library.
## Testing
Extend fixtures to cover GIO inclusion and missing-library rejection across platforms, loading GIO and its transitive dependency after moving a Linux runtime, and resolving `gio-2.0` through pkg-config after moving an SDK.
GitOrigin-RevId: d12e45d387d56c54d94d788cf07d82bb22c2b4a3
## What changed
- Add an x64 and ARM64 MSVC runtime preparer that uses `dumpbin` to validate
PE32+ DLL metadata, selects the declared GStreamer plugins and dependency
closure, and copies them unchanged into a private `bin/` directory.
- Reject malformed or unsupported PE metadata, path-bearing imports, delayed
imports, managed DLLs, forwarded exports, undeclared dependencies, and
case-insensitive DLL identity conflicts.
- Keep `third_party/voice/sources.json` line endings stable across Windows
checkouts so native build receipts remain valid.
## Testing
Add native Windows tests for relocated DLL loading with a restricted search
path, receipt and digest failures, duplicate identities, malformed PE headers,
unsupported loader features, and cleanup after failed preparation.
GitOrigin-RevId: 5375f21fc54f5d597f3d4e5f8fbca3df307fa2a8
