feat(openflare): 将定时任务迁入 Wavelet Asynq 异步任务框架

将 SSL 续期、可观测数据清理、WAF IP 组同步与 Uptime Kuma 同步
从 API 进程内 cron 迁移为 Asynq Handler，并通过 w_schedules 种子迁移
注册默认定时调度；移除 bootstrap 中的 in-process cron 启动逻辑。

Wavelet/internal/db/migrator/goose/sqlite/202606190013_seed_openflare_schedules.sql

@@ -0,0 +1,11 @@
+-- +goose Up
+INSERT INTO w_schedules (id, name, task_type, cron, payload, is_active, created_at, updated_at)
+VALUES
+    (101, 'OpenFlare SSL 自动续期', 'of_ssl_renew', '0 0 * * *', '{}', 1, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP),
+    (102, 'OpenFlare 可观测数据自动清理', 'of_database_auto_cleanup', '0 3 * * *', '{}', 1, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP),
+    (103, 'OpenFlare WAF IP 组同步', 'of_waf_ip_group_sync', '*/5 * * * *', '{}', 1, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP),
+    (104, 'OpenFlare Uptime Kuma 同步', 'of_uptime_kuma_sync', '* * * * *', '{}', 1, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)
+ON CONFLICT (id) DO NOTHING;
+
+-- +goose Down
+DELETE FROM w_schedules WHERE id IN (101, 102, 103, 104);