* feat(terminal): report execution host and listing scope in terminal list
`orca terminal list` returned rows with no host identity and no statement
of what the listing covered, so a scoped listing that saw nothing read as
"nothing exists anywhere" — an agent reported a live remote worker dead.
Each row now carries an optional `executionHostId` derived from the PTY id
(SSH and paired-runtime ids embed their owner), and the result carries an
optional `hostScope` naming the hosts covered and the known hosts skipped.
Both are surfaced in `--json` and in the human-readable CLI output, where
an absent field renders as `unknown` rather than `local`.
Both row builders route through one resolver, so the rule lives in one place.
* fix(terminal): preserve unverifiable host scope
* fix(terminal): fail closed on unverifiable hosts
* test(terminal): name unverifiable scope explicitly
* perf(terminal): keep graph hydration host scans narrow
* fix(terminal): reject blank foreign host owners
* fix(terminal): validate inferred inventory hosts
* fix(terminal): preserve paired folder host scope
* fix(terminal): keep inventory host inference typed
* fix(terminal): disclose paired folder hosts
Brennan Benson
8ca4ed945e