feat(adminui): FOCAS typed driver page
Adds FocasDriverPage.razor (route: /clusters/{id}/drivers/new/focas) with
typed sections for timeout, probe, AlarmProjection (enabled + poll interval),
HandleRecycle (enabled + interval in minutes), FixedTree (enabled + axis/
program/timer poll intervals), and read-only JSON views for Devices and Tags.
FormModel uses flat settable properties + FromOptions/ToOptions with
appropriate unit conversions (ms, minutes). Also adds
FocasDriverPageFormSerializationTests (3 tests: JSON round-trip, unknown-field
drop, FormModel round-trip covering all sub-options classes).
Joseph Doherty
8149739161