Replaces the Tasks placeholder with sample 06: every organization's
tasks read through its own bus and tagged with the org, Kanban and List
with the layout remembered per viewer, and org, project, state,
assignee and label filters. A down org keeps its U1 state.
Writes (create, move, edit, archive) go to POST /api/workspace/tasks,
behind the hook fence, owner only and --send only. Each write resolves
only the org it names and calls that org's bus with the person's store
verbs, so the bus's human check, tracker check and digest check all
apply. Refusals reach the person with what was and was not written.
A Vikunja organization's tasks are read through the tasks adapter and
shown read only; the store verbs refuse them with tracker-not-store.