Revert "Revert "Restore streaming API output format (#4100)""
Revert "Revert "Restore streaming API output format (#4100)""

This reverts commit 62c79eda08851731f7e8474d7acf628be3eafe28.

ikuradon/mastodon,ikuradon/mastodon,ikuradon/mastodon,ikuradon/mastodon