Replace all sensor.* logger namespaces with __name__ (generic module
identifiers instead of discoverable 'sensor.*' prefixes).
Change hardcoded 'bb' API user to 'admin' in config and code defaults.
Change hardcoded relay_user 'bb' to 'operator' — prevents network
profiling from exposing tool identity via SSH config.
Fixes#457, #458, #459
Cobra