fix: add missing SKIP_DOWNLOAD initialization

Addresses #459 #461 - Consolidates variable initialization at the top
of the script alongside other defaults. Removes redundant BUILD_FROM_SOURCE
initialization from argument parsing section.

install.sh

@@ -17,6 +17,8 @@ INSTALL_DIR="/opt/pulse"
 CONFIG_DIR="/etc/pulse"  # All config and data goes here for manual installs
 SERVICE_NAME="pulse"
 GITHUB_REPO="rcourtman/Pulse"
+BUILD_FROM_SOURCE=false
+SKIP_DOWNLOAD=false
 
 # Wrapper for systemctl commands that might hang in unprivileged containers
 safe_systemctl() {
@@ -2372,7 +2374,6 @@ reset_pulse() {
 # Parse command line arguments
 FORCE_VERSION=""
 FORCE_CHANNEL=""
-BUILD_FROM_SOURCE=false
 SOURCE_BRANCH="main"
 IN_CONTAINER=false
 IN_DOCKER=false