feat: Add --local-binary flag to install-temp-proxy.sh for pre-release testing

Allows testing the proxy installation with a locally-built binary instead
of requiring a GitHub release. This enables proper E2E testing before
shipping a release.

Usage:
  ./install-temp-proxy.sh --ctid 112 --local-binary /path/to/pulse-temp-proxy

The script will:
- Use the provided binary instead of downloading from GitHub
- Still handle all setup (systemd service, SSH keys, bind mounts)
- Allow full integration testing without a release

This solves the chicken-and-egg problem of needing a release to test
the installation process.

Related to #528

scripts/install-temp-proxy.sh

@@ -32,6 +32,7 @@ fi
 # Parse arguments
 CTID=""
 VERSION="latest"
+LOCAL_BINARY=""
 
 while [[ $# -gt 0 ]]; do
     case $1 in
@@ -43,6 +44,10 @@ while [[ $# -gt 0 ]]; do
             VERSION="$2"
             shift 2
             ;;
+        --local-binary)
+            LOCAL_BINARY="$2"
+            shift 2
+            ;;
         *)
             print_error "Unknown option: $1"
             exit 1
@@ -52,7 +57,7 @@ done
 
 if [[ -z "$CTID" ]]; then
     print_error "Missing required argument: --ctid <container-id>"
-    echo "Usage: $0 --ctid <container-id> [--version <version>]"
+    echo "Usage: $0 --ctid <container-id> [--version <version>] [--local-binary <path>]"
     exit 1
 fi
 
@@ -64,9 +69,26 @@ fi
 
 print_info "Installing pulse-temp-proxy for container $CTID"
 
-# Determine download URL
+BINARY_PATH="/usr/local/bin/pulse-temp-proxy"
-GITHUB_REPO="rcourtman/Pulse"
+SERVICE_PATH="/etc/systemd/system/pulse-temp-proxy.service"
-if [[ "$VERSION" == "latest" ]]; then
+SOCKET_PATH="/var/run/pulse-temp-proxy.sock"
+SSH_DIR="/var/lib/pulse-temp-proxy/ssh"
+
+# Install binary - either from local file or download from GitHub
+if [[ -n "$LOCAL_BINARY" ]]; then
+    # Use local binary for testing
+    print_info "Using local binary: $LOCAL_BINARY"
+    if [[ ! -f "$LOCAL_BINARY" ]]; then
+        print_error "Local binary not found: $LOCAL_BINARY"
+        exit 1
+    fi
+    cp "$LOCAL_BINARY" "$BINARY_PATH"
+    chmod +x "$BINARY_PATH"
+    print_info "Binary installed to $BINARY_PATH"
+else
+    # Download from GitHub release
+    GITHUB_REPO="rcourtman/Pulse"
+    if [[ "$VERSION" == "latest" ]]; then
         RELEASE_URL="https://api.github.com/repos/$GITHUB_REPO/releases/latest"
         print_info "Fetching latest release info..."
         RELEASE_DATA=$(curl -fsSL "$RELEASE_URL")
@@ -76,11 +98,11 @@ if [[ "$VERSION" == "latest" ]]; then
             exit 1
         fi
         print_info "Latest version: $VERSION"
-fi
+    fi
 
-# Detect architecture
+    # Detect architecture
-ARCH=$(uname -m)
+    ARCH=$(uname -m)
-case $ARCH in
+    case $ARCH in
         x86_64)
             BINARY_NAME="pulse-temp-proxy-linux-amd64"
             ;;
@@ -94,25 +116,22 @@ case $ARCH in
             print_error "Unsupported architecture: $ARCH"
             exit 1
             ;;
-esac
+    esac
 
-DOWNLOAD_URL="https://github.com/$GITHUB_REPO/releases/download/$VERSION/$BINARY_NAME"
+    DOWNLOAD_URL="https://github.com/$GITHUB_REPO/releases/download/$VERSION/$BINARY_NAME"
-BINARY_PATH="/usr/local/bin/pulse-temp-proxy"
-SERVICE_PATH="/etc/systemd/system/pulse-temp-proxy.service"
-SOCKET_PATH="/var/run/pulse-temp-proxy.sock"
-SSH_DIR="/var/lib/pulse-temp-proxy/ssh"
 
-# Download binary
+    # Download binary
-print_info "Downloading $BINARY_NAME..."
+    print_info "Downloading $BINARY_NAME..."
-if ! curl -fsSL "$DOWNLOAD_URL" -o "$BINARY_PATH.tmp"; then
+    if ! curl -fsSL "$DOWNLOAD_URL" -o "$BINARY_PATH.tmp"; then
         print_error "Failed to download binary from $DOWNLOAD_URL"
         exit 1
-fi
+    fi
 
-# Make executable and move to final location
+    # Make executable and move to final location
-chmod +x "$BINARY_PATH.tmp"
+    chmod +x "$BINARY_PATH.tmp"
-mv "$BINARY_PATH.tmp" "$BINARY_PATH"
+    mv "$BINARY_PATH.tmp" "$BINARY_PATH"
-print_info "Binary installed to $BINARY_PATH"
+    print_info "Binary installed to $BINARY_PATH"
+fi
 
 # Create SSH key directory
 mkdir -p "$SSH_DIR"