Add QM version detection to load appropriate integration

Detect QM 4.0+ via the QM_VERSION constant and load the collector-based
integration. Fall back to the existing HTML output override for QM 3.x.

Author: JanJakes

packages/plugin-sqlite-database-integration/integrations/query-monitor/boot.php

@@ -67,7 +67,13 @@ function register_sqlite_enhancements_for_query_monitor() {
 		return;
 	}
 
-	require_once __DIR__ . '/plugin.php';
+	// QM 4.0+ uses client-side Preact rendering — use collector + JS injection.
+	// QM 3.x uses server-side PHP rendering — use HTML output override.
+	if ( defined( 'QM_VERSION' ) && version_compare( QM_VERSION, '4.0.0', '>=' ) ) {
+		require_once __DIR__ . '/collector.php';
+	} else {
+		require_once __DIR__ . '/plugin.php';
+	}
 
 	if ( ! defined( 'SQLITE_QUERY_MONITOR_LOADED' ) ) {
 		define( 'SQLITE_QUERY_MONITOR_LOADED', true );