fix(installer): Improve Node.js binary detection, dependency management, and SNMPv3 fallback logic

setup.sh

@@ -222,6 +222,25 @@ echo "dist_ts directory successfully downloaded from npm registry."
 # Make launcher script executable
 chmod +x "$SCRIPT_DIR/bin/nupst"
 
+# Install production dependencies
+echo "Installing production dependencies..."
+"$SCRIPT_DIR/vendor/$NODE_DIR/bin/npm" --prefix "$SCRIPT_DIR" ci --only=production --no-audit --no-fund
+
+if [ $? -ne 0 ]; then
+  echo "Warning: Failed to install dependencies with 'npm ci'. Trying 'npm install'..."
+  "$SCRIPT_DIR/vendor/$NODE_DIR/bin/npm" --prefix "$SCRIPT_DIR" install --only=production --no-audit --no-fund
+  
+  if [ $? -ne 0 ]; then
+    echo "Error: Failed to install dependencies. NUPST may not function correctly."
+    echo "You can try to install dependencies manually by running:"
+    echo "cd $SCRIPT_DIR && npm install --only=production"
+  else
+    echo "Dependencies installed successfully with 'npm install'."
+  fi
+else
+  echo "Dependencies installed successfully with 'npm ci'."
+fi
+
 echo "NUPST setup completed successfully."
 echo "You can now run NUPST using: $SCRIPT_DIR/bin/nupst"
 echo "To install NUPST globally, run: sudo ln -s $SCRIPT_DIR/bin/nupst /usr/local/bin/nupst"