新增 SQL 题型：SQLite 内联判题（不依赖外部沙箱）

- SQL 作为语言接入现有提交流程，judge_task 按 language 分流到 SQLJudgeDispatcher
- judge/sql_runner.py：内存 SQLite 判题核心，查询题比结果集/增删改题比表状态，
  authorizer + progress_handler + max_page_count 三重防护
- dispatcher 提取 _process_judge_result/_push_status 供 SQL 判题复用（行为不变）
- 测试点通道支持 1.sql..N.sql 压缩包，出题只需数据脚本+标准答案
- Problem 增加 sql_config 字段；options 数据迁移注册 SQL 语言

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

judge/tasks.py

@@ -2,13 +2,18 @@ import dramatiq
 
 from account.models import User
 from judge.dispatcher import JudgeDispatcher
+from judge.sql_dispatcher import SQLJudgeDispatcher
 from submission.models import Submission
 from utils.shortcuts import DRAMATIQ_WORKER_ARGS
 
 
 @dramatiq.actor(**DRAMATIQ_WORKER_ARGS())
 def judge_task(submission_id, problem_id):
-    uid = Submission.objects.get(id=submission_id).user_id
-    if User.objects.get(id=uid).is_disabled:
+    submission = Submission.objects.get(id=submission_id)
+    if User.objects.get(id=submission.user_id).is_disabled:
         return
-    JudgeDispatcher(submission_id, problem_id).judge()
+    # SQL 题不依赖 JudgeServer 沙箱，在 worker 内用 sqlite3 判题
+    if submission.language == "SQL":
+        SQLJudgeDispatcher(submission_id, problem_id).judge()
+    else:
+        JudgeDispatcher(submission_id, problem_id).judge()