fix(recon): voice-detect metal build branch + face-detect gallery usecases

Add the missing metal BUILD_TYPE branch to the voice-detect Makefile
forwarding -DVOICEDETECT_GGML_METAL=ON, mirroring face-detect, so the
darwin metal CI artifact is built with the Metal backend instead of
CPU-only.

Expand the 4 face-detect gallery models' known_usecases to
[face_recognition, detection, embeddings] to match the backend
capabilities map and the mirrored insightface-buffalo entries, so
auto-selection for /v1/detect and /embeddings works.

Signed-off-by: Ettore Di Giacinto <mudler@localai.io>
Assisted-by: Claude:claude-opus-4-8 [Claude Code]

backend/go/voice-detect/Makefile

@@ -44,6 +44,8 @@ else ifeq ($(BUILD_TYPE),hipblas)
 	CMAKE_ARGS+=-DVOICEDETECT_GGML_HIP=ON
 else ifeq ($(BUILD_TYPE),vulkan)
 	CMAKE_ARGS+=-DVOICEDETECT_GGML_VULKAN=ON
+else ifeq ($(BUILD_TYPE),metal)
+	CMAKE_ARGS+=-DVOICEDETECT_GGML_METAL=ON
 endif
 
 .PHONY: voice-detect-grpc package build clean purge test all

gallery/index.yaml

@@ -8481,6 +8481,8 @@
     backend: face-detect
     known_usecases:
       - face_recognition
+      - detection
+      - embeddings
     options:
       - verify_threshold:0.35
     parameters:
@@ -8518,6 +8520,8 @@
     backend: face-detect
     known_usecases:
       - face_recognition
+      - detection
+      - embeddings
     options:
       - verify_threshold:0.35
     parameters:
@@ -8554,6 +8558,8 @@
     backend: face-detect
     known_usecases:
       - face_recognition
+      - detection
+      - embeddings
     options:
       - verify_threshold:0.35
     parameters:
@@ -8590,6 +8596,8 @@
     backend: face-detect
     known_usecases:
       - face_recognition
+      - detection
+      - embeddings
     options:
       - verify_threshold:0.363
     parameters: