Add file-based API cache — monitor and arrs pages now serve from /tmp/vv_cache instead of making live HTTP calls on every page load

Tools/api_cache_writer.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+# ==============================================================================================
+# ================================= API Cache Writer ===========================================
+# ==============================================================================================
+#
+# PURPOSE
+# ─────────────────────────────────────────────────────────────────────────────
+# Builds the monitor and arrs API payloads and writes them to /tmp/vv_cache/
+# so page loads can serve from the file instantly instead of making live HTTP
+# calls on every request.
+#
+# Runs every minute via the Varaverk scheduler. /tmp is tmpfs — files are
+# RAM-speed reads and auto-cleared on reboot.
+#
+# ==============================================================================================
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+php "$SCRIPT_DIR/api_cache_writer.php"