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/apps/openflare/tasks/doc.go

@@ -1,15 +1,9 @@
 // Copyright 2026 Arctel.net
 // SPDX-License-Identifier: Apache-2.0
 
-// Package tasks is the single home for OpenFlare scheduled and background work
-// that runs inside the API process (goroutines plus robfig/cron), not the Asynq
-// worker or scheduler.
+// Package tasks hosts shared OpenFlare background job business logic.
 //
-// Each job lives in its own file and registers via registerJob in init(). This
-// layout is intentional so jobs can migrate to a future task framework without
-// changing call sites: swap the registry implementation while keeping per-job files.
-//
-// Wire-up: bootstrap.RegisterOpenFlareBackgroundTasks imports this package so
-// init() registrations run; bootstrap.Init starts the cron scheduler when the
-// process serves the HTTP API.
-package tasks
+// Scheduled execution is handled by the Wavelet Asynq task framework; handlers
+// live in internal/apps/openflare/async_tasks.go and are registered via
+// bootstrap.RegisterTasks().
+package tasks