resolve_host_mac() returns the manually configured MAC immediately,
with no Socket Proxy /info call at all - the config.json text still
described it as a fallback used only when auto-detection fails.
Reworded both the setting's own description and the parent "Docker
hosts" description to match actual behavior.
The case-insensitivity regression test for lookup_device_mac() stubbed
DeviceInstance.getByMac() to return a fixed row regardless of input,
so it passed even without exercising real collation - functionally a
duplicate of test_lookup_device_mac_found. Replaced it with a
delegation check, and added real SQLite-backed coverage for
DeviceInstance.getByMac()'s case-insensitivity in
test/backend/test_device_instance.py. That surfaced a gap in the
shared db_test_helpers.py fixture: its Devices.devMac column was
missing the COLLATE NOCASE that the real schema declares, so it could
not have exercised this behavior. Fixed the fixture to match.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_011meLPKCzVpdZyAUfv5U6mm
