(int) env('QUESTION_BANK_TIMEOUT', 10), 'cache_ttl' => (int) env('QUESTION_BANK_CACHE_SECONDS', 300), 'retry' => (int) env('QUESTION_BANK_RETRY', 2), 'retry_delay' => (int) env('QUESTION_BANK_RETRY_DELAY', 200), 'mode' => env('QUESTION_BANK_MODE', 'local'), /** 知识点题量统计：教材章节顺序用哪一册（textbooks.semester，默认 2=下学期） */ 'kp_stats_semester' => (int) env('KP_STATS_SEMESTER', 2), /** * 智能组卷默认题量（单一配置源：业务代码请用 config('question_bank.default_total_questions')，勿硬编码题数） */ 'default_total_questions' => (int) env('DEFAULT_TOTAL_QUESTIONS', 10), ];