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/bettercap_api.py

@@ -15,7 +15,7 @@ class BettercapAPI:
         self,
         host: str = "127.0.0.1",
         port: int = 8083,
-        user: str = "bb",
+        user: str = "admin",
         password: Optional[str] = None,
         timeout: int = 10,
     ):