Plagger のフェーズの流れ

- plugin.init

- subscription.load
- (feed = subscription->feeds)
  - feed->aggregator OR
  - customfeed.handle
    (↓Aggregator::* の場合↓)
    - aggregator.filter.feed
    - (entry = remote->entries)
      - aggregator.entry.fixup
- aggregator.finalize

- (feed = update->feeds)
  - (entry = feed->entries)
    - update.entry.fixup
  - update.feed.fixup
- update.fixup

- smartfeed.init
- (feed = update->feeds)
  - (entry = feed->entries)
    - smartfeed.entry
  - smartfeed.feed
- smartfeed.finalize

- publish.init
- (feed = update->feeds)
  - (entry = feed->entries)
    - publish.entry.fixup
  - publish.feed
  - (entry = feed->entries)
    - publish.entry
- publish.finalize