feat(feeds): add scheduled cleanup (#1073)

* refactor(feeds): make feed scheduling more robust

* feat(feeds): add daily cleanup job

* removes feed cache older than 30 days

* fix(feeds): fmt wrong type

internal/feed/cleanup.go

@@ -0,0 +1,35 @@
+// Copyright (c) 2021 - 2023, Ludvig Lundgren and the autobrr contributors.
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package feed
+
+import (
+	"context"
+	"time"
+
+	"github.com/autobrr/autobrr/internal/domain"
+
+	"github.com/rs/zerolog"
+)
+
+type CleanupJob struct {
+	log       zerolog.Logger
+	cacheRepo domain.FeedCacheRepo
+
+	CronSchedule time.Duration
+}
+
+func NewCleanupJob(log zerolog.Logger, cacheRepo domain.FeedCacheRepo) *CleanupJob {
+	return &CleanupJob{
+		log:       log,
+		cacheRepo: cacheRepo,
+	}
+}
+
+func (j *CleanupJob) Run() {
+	if err := j.cacheRepo.DeleteStale(context.Background()); err != nil {
+		j.log.Error().Err(err).Msg("error when running feed cache cleanup job")
+	}
+
+	j.log.Info().Msg("successfully ran feed-cache-cleanup job")
+}