[feature] add streaming of statuses and status updates to LOCAL / PUBLIC timelines (#4353)

This adds streaming of statuses and edits to LOCAL and PUBLIC timeline types. Note that in the future we should probably rearrange some of the surface code so we don't perform so many repeated mute and visibility checks on the same status in sequence.

closes https://codeberg.org/superseriousbusiness/gotosocial/issues/4342

Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4353
Co-authored-by: kim <grufwub@gmail.com>
Co-committed-by: kim <grufwub@gmail.com>

internal/cache/db.go

@@ -154,6 +154,7 @@ type DBCaches struct {
 		Domains  atomic.Pointer[int]
 		Statuses atomic.Pointer[int]
 		Users    atomic.Pointer[int]
+		UserIDs  atomic.Pointer[[]string]
 	}
 
 	// InteractionRequest provides access to the gtsmodel InteractionRequest database cache.