library upgrades: libffi 3.4.5→3.7.1, libarchive 3.6.2→3.8.8, libuv 1.51.0→1.52.1, libxml2 2.11.3→2.15.3

All tarballs re-downloaded from upstream mirrors, BLAKE3 hashes verified.
Continuing the comprehensive recipe walk per user instruction.

recipes/libs/libarchive/recipe.toml

@@ -1,6 +1,6 @@
 [source]
-tar = "https://libarchive.org/downloads/libarchive-3.6.2.tar.xz"
-blake3 = "f98695fe81235a74fa3fc2c3ba0f0d4f13ea15f9be3850b83e304cf5d78be710"
+tar = "https://libarchive.org/downloads/libarchive-3.8.8/libarchive-3.8.8.tar.xz"
+blake3 = "a7d4dd38d2ace0487c391573834243b7dea241eb7c4ac5ba1083597d888b9024"
 patches = [
     "redox.patch"
 ]

recipes/libs/libffi/recipe.toml

@@ -1,6 +1,6 @@
 [source]
-tar = "https://github.com/libffi/libffi/releases/download/v3.4.5/libffi-3.4.5.tar.gz"
-blake3 = "f9a2cfe1d2ac8d211c18c99f9cfafe5537925101bfb92c2d44d844680dd82264"
+tar = "https://github.com/libffi/libffi/releases/download/v3.7.1/libffi-3.7.1.tar.gz"
+blake3 = "1bf7b495a1aa00be51437d75adb234424a32449df80fd9a2c3727c48322966f9"
 script = """
 DYNAMIC_INIT
 cp ${COOKBOOK_HOST_SYSROOT}/share/aclocal/libtool.m4 ./m4/

recipes/libs/libuv/recipe.toml

@@ -1,6 +1,6 @@
 [source]
-tar = "https://dist.libuv.org/dist/v1.51.0/libuv-v1.51.0.tar.gz"
-blake3 = "e8b5e68bc2d0776ac4ea67df59d694fca58d5cc570c103443a2284e723d01fc2"
+tar = "https://dist.libuv.org/dist/v1.52.1/libuv-v1.52.1.tar.gz"
+blake3 = "433979d1027ec72d546e1e4440e193a9d587f1378a8405299d6f219d23c215b7"
 patches = ["redox.patch"]
 
 [build]

recipes/libs/libxml2/recipe.toml

@@ -1,6 +1,6 @@
 [source]
-tar = "https://download.gnome.org/sources/libxml2/2.11/libxml2-2.11.3.tar.xz"
-blake3 = "0653d3750576299c4cb88740942165671b576ff93019f3d669b3f37136225ab7"
+tar = "https://gitlab.gnome.org/GNOME/libxml2/-/archive/v2.15.3/libxml2-v2.15.3.tar.bz2"
+blake3 = "03c5284cd7fe6b524f9b69d3d7e42fd6f0226d1873eefbba1e485fe045024423"
 script = """
 autotools_recursive_regenerate
 """