fix: improve sensor proxy install script reliability

Fixes two issues with the sensor proxy installation:
1. Local node IP detection now uses exact matching instead of substring matching to avoid false negatives
2. Removes duplicate output filtering in the setup script wrapper

These changes ensure that the proxy SSH key is correctly configured on the local node during cluster installations.

internal/api/config_handlers.go

@@ -3732,10 +3732,6 @@ if [ "$PULSE_IS_CONTAINERIZED" = true ] && [ -n "$PULSE_CTID" ]; then
                 echo "$INSTALL_OUTPUT" | grep -E "✓|⚠️|ERROR" || true
             fi
 
-            if [ -n "$INSTALL_OUTPUT" ]; then
-                echo "$INSTALL_OUTPUT" | grep -E "✓|⚠️|ERROR" || true
-            fi
-
             if [ $INSTALL_STATUS -eq 0 ]; then
                 # Verify proxy health
                 PROXY_HEALTHY=false

scripts/install-sensor-proxy.sh

@@ -351,9 +351,13 @@ if command -v pvecm >/dev/null 2>&1; then
             print_info "Authorizing proxy key on node $node_ip..."
 
             IS_LOCAL=false
-            if [[ " $LOCAL_IPS " == *" $node_ip "* ]]; then
-                IS_LOCAL=true
-            fi
+            # Check if node_ip matches any of the local IPs (exact match with word boundaries)
+            for local_ip in $LOCAL_IPS; do
+                if [[ "$node_ip" == "$local_ip" ]]; then
+                    IS_LOCAL=true
+                    break
+                fi
+            done
             if [[ " $LOCAL_HOSTNAMES " == *" $node_ip "* ]]; then
                 IS_LOCAL=true
             fi