Add cache clear utility script

- Add clear-cache.php for clearing PHP OPcache and realpath cache
- Useful for debugging and ensuring latest code changes are visible

aurora-livecam/clear-cache.php

@@ -0,0 +1,15 @@
+<?php
+// Clear PHP OPcache
+if (function_exists('opcache_reset')) {
+    opcache_reset();
+    echo "OPcache cleared successfully!\n";
+} else {
+    echo "OPcache not available\n";
+}
+
+// Clear realpath cache
+clearstatcache(true);
+echo "Realpath cache cleared!\n";
+
+echo "\nNow reload the page with CTRL+F5 (hard refresh)\n";
+?>