fix(deploy): prevent ultralytics from re-installing CPU onnxruntime

Root cause: ultralytics AutoUpdate detects onnx/onnxslim/onnxruntime
as missing during ONNX export and auto-installs CPU onnxruntime,
re-shadowing onnxruntime-rocm.

Three-layer defense:
- requirements_rocm.txt: pre-install onnx + onnxslim so ultralytics
  doesn't trigger AutoUpdate for ONNX export deps
- deploy.sh: set YOLO_AUTOINSTALL=0 during export step
- deploy.sh: post-export cleanup removes CPU onnxruntime if present

Author: solderzzc

skills/detection/yolo-detection-2026/deploy.sh

@@ -176,6 +176,9 @@ if [ "$BACKEND" != "cpu" ] || [ -f "$SKILL_DIR/requirements_cpu.txt" ]; then
     log "Pre-converting model to optimized format for $BACKEND..."
     emit "{\"event\": \"progress\", \"stage\": \"optimize\", \"message\": \"Converting model for $BACKEND (~30-120s)...\"}"
 
+    # Disable ultralytics auto-install (it would re-install CPU onnxruntime)
+    export YOLO_AUTOINSTALL=0
+
     "$VENV_DIR/bin/python" -c "
 import sys
 sys.path.insert(0, '$ENV_CONFIG_DIR')
@@ -202,6 +205,14 @@ else:
     fi
 fi
 
+# ROCm: final cleanup — remove CPU onnxruntime if ultralytics re-installed it
+if [ "$BACKEND" = "rocm" ]; then
+    if "$PIP" show onnxruntime 2>/dev/null | grep -q "^Name: onnxruntime$"; then
+        log "Post-export cleanup: removing CPU onnxruntime (re-installed by ultralytics)..."
+        "$PIP" uninstall -y onnxruntime -q 2>&1 || true
+    fi
+fi
+
 # ─── Step 6: Verify installation ────────────────────────────────────────────
 
 log "Verifying installation..."

skills/detection/yolo-detection-2026/requirements_rocm.txt

@@ -5,6 +5,8 @@ torch>=2.4.0
 torchvision>=0.19.0
 ultralytics>=8.3.0
 onnxruntime-rocm>=1.18
+onnx>=1.12.0,<2.0.0        # pre-install: prevents ultralytics from auto-installing CPU onnxruntime
+onnxslim>=0.1.71            # pre-install: same reason
 numpy>=1.24.0
 opencv-python-headless>=4.8.0
 Pillow>=10.0.0