v5.2.1: robust GUI Verify/Extract + refreshed comparison & audit tables

Version bump to 5.2.1. Docs: 'What's new in 5.2.1', a refreshed Compression
comparison section (ratio + throughput vs zstd/gzip/lz4 on codec 2.65.3, all
round-trips byte-exact) and a new Audit status table (make check 16/16, FIPS 203
3/3, the full security regression matrix). Packaging versions bumped. (The GUI
Verify/Extract code fix is commit 2512844.)

packaging/guix/vaptvupt.scm

@@ -62,7 +62,7 @@
         xcb-util-renderutil xcb-util-wm xcb-util-cursor
         libinput-minimal mtdev libevdev eudev))
 
-(define %vaptvupt-version "5.2.0")
+(define %vaptvupt-version "5.2.1")
 
 (define %vaptvupt-source
   (origin

packaging/homebrew/vaptvupt.rb

@@ -22,8 +22,8 @@
 class Vaptvupt < Formula
   desc "Post-quantum backup compression utility (ML-KEM-768 + AES-256-CTR + HMAC-SHA256)"
   homepage "https://git.securityops.co/cristiancmoises/vaptvupt"
-  url "https://git.securityops.co/cristiancmoises/vaptvupt/releases/download/v5.2.0/vaptvupt-5.2.0.tar.gz"
-  version "5.2.0"
+  url "https://git.securityops.co/cristiancmoises/vaptvupt/releases/download/v5.2.1/vaptvupt-5.2.1.tar.gz"
+  version "5.2.1"
   sha256 "REPLACE_WITH_SHA256_OF_RELEASE_TARBALL"
   license "AGPL-3.0-or-later"
 

packaging/opensuse/vaptvupt.spec

@@ -19,7 +19,7 @@
 
 
 Name:           vaptvupt
-Version:        5.2.0
+Version:        5.2.1
 Release:        0
 Summary:        Post-quantum backup compression with AES-256 + ML-KEM-768 hybrid encryption
 License:        AGPL-3.0-or-later

packaging/rpm/vaptvupt.spec

@@ -20,7 +20,7 @@
 # in the base.
 
 Name:           vaptvupt
-Version:        5.2.0
+Version:        5.2.1
 Release:        1%{?dist}
 Summary:        Post-quantum backup compression utility (AES-256 + ML-KEM-768 + Argon2id, formerly Zupt)