pub const DEFAULT_EXPOSURE_US: f64 = 5000.0;Expand description
REG_USER_SET_SELECTOR and REG_USER_SET_LOAD back the SFNC user-set
features, so the fake can answer the workflow issue #121 was filed about.
UserSetLoad is also the fake’s first command that reaches its register
through <pValue> rather than a bare <Address>. That matters for backlog
GA-10: all 432 <Command> nodes in the vendor corpus use <pValue>, and
until now all three of the fake’s used the direct-address path — so our
integration tests exercised only the path no real camera takes.
Exposure the fake boots with, and returns to on UserSetLoad.