docs(terminal): record the finalized two-plane architecture decision

Adopts the data-plane proposal and adds the control-plane track it does not
cover: re-key ownership by pane, split orphan inventory out, then delete the
compensating code. Records that the host-authority alternative was refuted and
that the shipped keystroke fence is inert on the reattach path.

Co-authored-by: Orca <help@stably.ai>
This commit is contained in:
Neil
2026-08-08 21:41:51 -07:00
co-authored by Orca
parent f9e8f81a45
commit 88bd43d51f
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