Harden security, modularize API bootstrap, and fix scale SSE auth.

Block web access to sensitive paths, require API_TOKEN for mutations, encrypt GitHub issue credentials in .env, auto-provision tokens for same-origin clients, and pass api_token in scale relay URLs since EventSource cannot send headers.

Co-authored-by: Cursor <cursoragent@cursor.com>

api/cron_smart_shopping.php

@@ -11,14 +11,16 @@ if (PHP_SAPI !== 'cli') {
     exit('Forbidden');
 }
 
-// Define CRON_MODE before loading index.php so the router is skipped
+// Define CRON_MODE before loading bootstrap so the HTTP router is skipped
 define('CRON_MODE', true);
 
-// Load all API functions without running the HTTP router
+require_once __DIR__ . '/bootstrap.php';
 require_once __DIR__ . '/index.php';
 
 const CACHE_FILE = __DIR__ . '/../data/smart_shopping_cache.json';
 
+evershelfRotateCronLog();
+
 try {
     $db = getDB();