CC'ing @MarkTraceur due to being listed as author on https://www.mediawiki.org/wiki/Extension:FileAnnotations.
Adding SDC General as it seems to be the WMF successor team to Multimedia if I interpret T240281 correctly.

The task graph in T151327 lists many subtasks which all have been "stalled" for years. This should not be the case.

"Stalled" means "If a task is waiting for further input (e.g. from the task author or a third party like upstream) and can currently not be acted on, the Stalled status is temporarily given. The Stalled status can also be given when a task is waiting for its subtask(s) to be resolved first."

https://www.mediawiki.org/wiki/Extension:FileAnnotations even states "This extension is currently not actively maintained!"

https://phabricator.wikimedia.org/maniphest/query/7PklnLu4rZTR/#R lists 37 open tasks, most of them with "Medium" priority ("someone is still planning to work on it").

Can someone please clarify what's the status and decide what to do with these tasks?
For the records: If you wanted to express that nobody is currently working on this task, then the assignee should be removed and/or priority could be lowered instead. If work on this task is blocked by another task, then that other task should be added via Edit Related Tasks... → Edit Subtasks. If this task is stalled on an upstream project, then the Upstream tag should be added. If this task requires info from the task reporter, then there should be instructions which info is needed. If this task is out of scope and nobody should ever work on this, then task status should have the "Declined" status.)
Thanks.