Its states presence, pulse and stuck and its first views were named from the constant
WatchmanModule; they are now `<cred.Module>_<state>` (watch.BucketsOf), and the watchman's
stuck keys of presence take its own presence bucket's name.
Builds: design 47 G A-296
Claude-Session: https://claude.ai/code/session_01NcbgfGKaxw984XyAPfLm4h