Strip OPSEC tool identity fingerprints

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

utils/networking.py

@@ -13,7 +13,7 @@ import logging
 from pathlib import Path
 from typing import List, Optional, Tuple
 
-logger = logging.getLogger("sensor.utils.networking")
+logger = logging.getLogger(__name__)
 
 SIOCGIFADDR = 0x8915
 SIOCGIFHWADDR = 0x8927