fix: add blake3 overlay port to fix vcpkg build failure

The pinned vcpkg commit has blake3 1.8.2 whose patch download hash
changed on GitHub, breaking all CI builds. Add a local overlay port
with blake3 1.8.3 (from upstream vcpkg) which removes the problematic
patch download. Also remove non-existent overlay-triplets path.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: rustyconover

vcpkg.json

@@ -5,10 +5,8 @@
   ],
   "vcpkg-configuration": {
     "overlay-ports": [
+      "./vcpkg_overlay_ports",
       "./extension-ci-tools/vcpkg_ports"
-    ],
-    "overlay-triplets": [
-      "./extension-ci-tools/toolchains"
     ]
   }
 }

vcpkg_overlay_ports/blake3/fix-windows-arm-build-error.patch

@@ -0,0 +1,13 @@
+diff --git a/c/blake3_dispatch.c b/c/blake3_dispatch.c
+index af6c3da..dce85b4 100644
+--- a/c/blake3_dispatch.c
++++ b/c/blake3_dispatch.c
+@@ -31,7 +31,7 @@
+ #define ATOMIC_INT _Atomic int
+ #define ATOMIC_LOAD(x) x
+ #define ATOMIC_STORE(x, y) x = y
+-#elif defined(_MSC_VER)
++#elif defined(IS_X86) && defined(_MSC_VER)
+ #define ATOMIC_INT LONG
+ #define ATOMIC_LOAD(x) InterlockedOr(&x, 0)
+ #define ATOMIC_STORE(x, y) InterlockedExchange(&x, y)

vcpkg_overlay_ports/blake3/portfile.cmake

@@ -0,0 +1,31 @@
+vcpkg_from_github(
+    OUT_SOURCE_PATH SOURCE_PATH
+    REPO BLAKE3-team/BLAKE3
+    REF "${VERSION}"
+    SHA512 d0861c3c0294d84a46a3760e5e51734f4040036aa74d72d32242adb9311c0f85f580c17fbee9ca17dc2b3818ff68048b3156a19b8d11fe5c459c5e9266709fb9
+    HEAD_REF main
+    PATCHES
+        fix-windows-arm-build-error.patch
+)
+
+vcpkg_check_features(
+    OUT_FEATURE_OPTIONS BLAKE3_FEATURE_OPTIONS
+    FEATURES
+        tbb BLAKE3_USE_TBB
+)
+
+vcpkg_cmake_configure(
+    SOURCE_PATH "${SOURCE_PATH}/c"
+    OPTIONS
+        ${BLAKE3_FEATURE_OPTIONS}
+        -DBLAKE3_FETCH_TBB=OFF
+        -DBLAKE3_EXAMPLES=OFF
+)
+
+vcpkg_cmake_install()
+
+vcpkg_cmake_config_fixup(CONFIG_PATH lib/cmake/${PORT})
+vcpkg_fixup_pkgconfig()
+
+file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/include")
+vcpkg_install_copyright(FILE_LIST "${SOURCE_PATH}/LICENSE_A2" "${SOURCE_PATH}/LICENSE_A2LLVM" "${SOURCE_PATH}/LICENSE_CC0")

vcpkg_overlay_ports/blake3/vcpkg.json

@@ -0,0 +1,28 @@
+{
+  "name": "blake3",
+  "version": "1.8.3",
+  "description": "BLAKE3 cryptographic hash function.",
+  "homepage": "https://github.com/BLAKE3-team/BLAKE3",
+  "license": "CC0-1.0 OR Apache-2.0",
+  "dependencies": [
+    {
+      "name": "vcpkg-cmake",
+      "host": true
+    },
+    {
+      "name": "vcpkg-cmake-config",
+      "host": true
+    }
+  ],
+  "features": {
+    "tbb": {
+      "description": "Enable TBB multi-threading API support",
+      "dependencies": [
+        {
+          "name": "tbb",
+          "default-features": false
+        }
+      ]
+    }
+  }
+}