Tasks assigned via Google Docs checkbox (self-assigned) don't appear in tasks.list #890

Summary
A task created by assigning a checkbox to myself inside a Google Doc (via Docs' native "assign to a person" action-item feature) never appears when querying Google Tasks via gws tasks tasks list, even after re-triggering the assignment.

Steps to reproduce

1. In a Google Doc, add a checkbox line and assign it to yourself (the doc owner/editor).
2. Google sends a notification email confirming "X assigned you a task" with the checkbox text.
3. Run gws tasks tasks list --params '{"tasklist": "<default-list-id>"}' (with showHidden, showCompleted, showDeleted all true, high maxResults, no pagination).
4. Search the returned items for the assigned checkbox text.

Expected: The task appears in the list (Google's own docs describe Docs-assigned action items as regular Task resources with assignmentInfo populated).

Actual: No matching task is returned — not even in a hidden/completed/deleted state. Re-assigning the same checkbox in the Doc does not trigger a retroactive sync either.

Environment

• gws (googleworkspace-cli) 0.22.5, installed via Homebrew
• macOS (Darwin)

Unknowns
Not sure whether this is a gws-specific gap (e.g., a missing API parameter or scope) or an upstream Google Tasks API limitation where Docs-assigned checkboxes simply aren't exposed via tasks.list for self-assigned items. Filing here in case it's the former, or so it can be pointed to the right owner if not.