refactor(pages): 公开部署源任务并默认每日扫描

移除 Pages 部署源任务的 InternalOnly 限制，任务管理可查看与调度；
将 scanner cron 与 GitHub latest 默认检查间隔调整为每天一次，
并优化部署历史列表展示。

internal/db/migrator/goose/sqlite/202607190003_seed_pages_source_scan.sql

@@ -3,7 +3,7 @@ INSERT INTO w_schedules (name, task_type, cron, payload, is_active, created_at,
 SELECT
     'OpenFlare Pages 部署源扫描',
     'of_pages_source_scan',
-    '*/5 * * * *',
+    '0 0 * * *',
     '{}',
     1,
     CURRENT_TIMESTAMP,
@@ -16,6 +16,6 @@ WHERE NOT EXISTS (
 DELETE FROM w_schedules
 WHERE task_type = 'of_pages_source_scan'
   AND name = 'OpenFlare Pages 部署源扫描'
-  AND cron = '*/5 * * * *'
+  AND cron = '0 0 * * *'
   AND payload = '{}'
   AND is_active = 1;