Re-evaluate allow-listed cargo audit advisories

[visorcraft]

Two advisories are currently ignored in src-tauri/.cargo/audit.toml because no fixed upstream version is available:

• RUSTSEC-2023-0071 – RSA Marvin timing side-channel in rsa 0.9.10 via underskrift / tsp-ltv (PAdES signing path).
• RUSTSEC-2024-0429 – unsoundness in glib::VariantStrIter from Tauri's webkit2gtk/wry GTK stack.

This issue tracks checking upstream for fixes and removing the allow-list entries once patched versions are released. Run cd src-tauri && cargo audit without the ignores periodically to see if they become actionable.