fix: remove all pulse service files during uninstall

- Added removal of pulse-monitor.service and pulse-proxmox.service during uninstall
- Fixes false positive "Pulse is installed" detection after removal
- Ensures complete cleanup of all legacy service files
- Prevents orphaned service files from interfering with installation detection

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: rcourtman

scripts/install-pulse.sh

@@ -817,7 +817,10 @@ perform_remove() {
     sleep 2
     pkill -9 -f "/opt/pulse/server/index.js" 2>/dev/null || true
 
+    # Remove all pulse-related service files
     rm -f "/etc/systemd/system/$SERVICE_NAME"
+    rm -f "/etc/systemd/system/pulse-monitor.service"
+    rm -f "/etc/systemd/system/pulse-proxmox.service"
     systemctl daemon-reload
 
     # Remove directories