Update Rust build system: use rustup with musl target for static builds

scripts/compile-components.sh

@@ -51,29 +51,21 @@ build_rust_component() {
     fi
     
     # Build the project
-    echo "    Compiling with cargo..."
-    if command -v cargo >/dev/null; then
-        cargo build --release
-        
-        # Install binary to Alpine root
-        mkdir -p "$ALPINE_ROOT$install_path"
-        cp "target/release/$binary_name" "$ALPINE_ROOT$install_path/"
-        chmod +x "$ALPINE_ROOT$install_path/$binary_name"
-        
-        echo "    Success: $install_path/$binary_name installed to Alpine root"
-        return 0
-    else
-        echo "    Error: cargo not found - installing Rust..."
-        apk add --no-cache rust cargo
-        cargo build --release
-        
-        mkdir -p "$ALPINE_ROOT$install_path"
-        cp "target/release/$binary_name" "$ALPINE_ROOT$install_path/"
-        chmod +x "$ALPINE_ROOT$install_path/$binary_name"
-        
-        echo "    Success: $install_path/$binary_name installed to Alpine root"
-        return 0
-    fi
+    echo "    Compiling with cargo for musl target..."
+    
+    # Source cargo environment
+    . ~/.cargo/env
+    
+    # Build with musl target for static linking
+    cargo build --release --target x86_64-unknown-linux-musl
+    
+    # Install binary to Alpine root
+    mkdir -p "$ALPINE_ROOT$install_path"
+    cp "target/x86_64-unknown-linux-musl/release/$binary_name" "$ALPINE_ROOT$install_path/"
+    chmod +x "$ALPINE_ROOT$install_path/$binary_name"
+    
+    echo "    Success: $install_path/$binary_name installed to Alpine root (musl static)"
+    return 0
 }
 
 # Function to build Go project from submodule