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

core/capture_bus.py

@@ -16,7 +16,7 @@ import threading
 import multiprocessing
 from typing import Optional, Callable
 
-logger = logging.getLogger("sensor.capture_bus")
+logger = logging.getLogger(__name__)
 
 # ETH_P_ALL for capturing all protocols
 ETH_P_ALL = 0x0003