fix(backends): darwin packaging for silero-vad (last Linux-only Go backend) (#10528)

fix(backends): darwin packaging for silero-vad

silero-vad was the last Go backend with Linux-only darwin packaging:
- package.sh fell through to "Could not detect architecture" -> exit 1 on
  macOS (no Darwin branch), so its darwin image never packaged.
- run.sh exported LD_LIBRARY_PATH, which macOS dyld ignores, so the bundled
  libonnxruntime.dylib couldn't be found at runtime.

Add a Darwin branch to package.sh (skip the glibc/ld.so bundling; add an
@loader_path/lib rpath so @rpath resolves to package/lib/) and a
DYLD_LIBRARY_PATH branch to run.sh — mirroring the piper darwin fix (#10525).

Assisted-by: Claude:claude-opus-4-8

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Co-authored-by: Ettore Di Giacinto <mudler@localai.io>

Author: localai-bot

backend/go/silero-vad/package.sh

@@ -15,7 +15,14 @@ cp -avf $CURDIR/run.sh $CURDIR/package/
 cp -rfLv $CURDIR/backend-assets/lib/* $CURDIR/package/lib/
 
 # Detect architecture and copy appropriate libraries
-if [ -f "/lib64/ld-linux-x86-64.so.2" ]; then
+if [ "$(uname)" = "Darwin" ]; then
+    # macOS has no glibc loader to bundle. silero-vad links its bundled
+    # libonnxruntime via @rpath but ships with no LC_RPATH, so dyld can't find
+    # it at runtime. Add an @loader_path/lib rpath so @rpath resolves to
+    # package/lib/ (matching the piper darwin fix, #10525).
+    echo "Detected macOS; adding @loader_path/lib rpath so bundled libs resolve via @rpath..."
+    install_name_tool -add_rpath @loader_path/lib "$CURDIR/package/silero-vad"
+elif [ -f "/lib64/ld-linux-x86-64.so.2" ]; then
     # x86_64 architecture
     echo "Detected x86_64 architecture, copying x86_64 libraries..."
     cp -arfLv /lib64/ld-linux-x86-64.so.2 $CURDIR/package/lib/ld.so

backend/go/silero-vad/run.sh

@@ -3,7 +3,11 @@ set -ex
 
 CURDIR=$(dirname "$(realpath "$0")")
 
-export LD_LIBRARY_PATH="$CURDIR"/lib:$LD_LIBRARY_PATH
+if [ "$(uname)" = "Darwin" ]; then
+	export DYLD_LIBRARY_PATH="$CURDIR"/lib:$DYLD_LIBRARY_PATH
+else
+	export LD_LIBRARY_PATH="$CURDIR"/lib:$LD_LIBRARY_PATH
+fi
 
 # If there is a lib/ld.so, use it
 if [ -f "$CURDIR"/lib/ld.so ]; then