origin/main introduced a new `archived` lifecycle status as a terminal
state reached by explicit user action on a previously terminal run.
deriveEmptyKind didn't know about it — archived runs with files would
have rendered "The diff for this run is no longer available. If you
expect files here, please report it.", which is wrong; the diff was
captured normally, the run was just archived later.
Adds `archived` to the terminal-success branch so archived runs show
the correct empty-state copy (R4b or R4c2) based on total_changed,
same as a succeeded run.
The regression-guard test is also tightened: it now iterates over
`RunStatus` from @qltysh/fabro-api-client rather than a hand-
maintained list, so any future addition to the OpenAPI spec fails
this test until the decision table grows a branch. This exact class
of silent-regression is what made me miss archived in the first
place.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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