fix(sys): keep --list-device consistent with the default view

[KayMKM]

Summary

winml sys --list-device reported fewer device details than winml sys for
the same hardware. On the OV e2e agent (Intel Core Ultra 7 258V + Arc 140V + AI
Boost NPU) the NPU/GPU rows lost architecture entirely, failing
TestSysCrossViewConsistency::test_devices_match_across_default_and_list_device_views
in the pytest: test_sys_e2e.py step (build 20260727.1, E2E Test — OV).

Root cause

_gather_device_info folds device_facts (Architecture, and Driver when
sysinfo has none) into each device's details, and its only source for those
facts is the EP inventory returned by _gather_ep_info — filesystem-backed EPs
are registered in isolated subprocesses, so the parent process can only see
those facts through the serialized inventory.

_gather gathered that inventory only when the EP section was requested:

if eps:
    info["executionProviders"] = _gather_ep_info()
if devices:
    info["devices"] = _gather_device_info(info.get("executionProviders"))

The default view asks for both sections, so enrichment ran. --list-device
asks for devices only, so ep_info was None and enrichment silently
no-oped. The mismatch only surfaces on hosts whose EPs actually report an
Architecture fact, which is why the OV stage caught it and the others did not.

Fix

Gather the EP inventory whenever devices are requested, and let eps decide
only whether the executionProviders section is emitted. The JSON payload
shape of --list-device is unchanged (still {"devices": [...]}), so the
existing single-key shape guard still holds. Because enrichment is
best-effort, an EP probing failure stays non-fatal for a devices-only request;
an explicitly pinned --list-ep still raises as before.

Verification

On the OV agent, --list-device and the default view now agree:

match = True
"details": { "driver": "32.0.100.4724", "manufacturer": "Intel Corporation", "architecture": "4000" }

• pytest -m e2e tests/e2e/test_sys_e2e.py — 19 passed (the failing case now passes)
• pytest tests/unit/commands/test_sys_device_info.py — 8 passed (4 new)
• pytest tests/unit/cli/test_main.py tests/cli/test_main.py — 48 passed