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

config/bigbrother.yaml

@@ -45,7 +45,7 @@ connectivity:
   reverse_ssh:
     relay_host: ""
     relay_port: 22
-    relay_user: "bb"
+    relay_user: "operator"
     key_file: "storage/config/ssh_relay.key"
 
 security:
@@ -90,7 +90,7 @@ bettercap:
   binary: "/usr/local/bin/bettercap"
   api_address: "127.0.0.1"        # Localhost only -- never network-visible
   api_port: 8083
-  api_user: "bb"
+  api_user: "admin"
   # api_password generated per-session, stored in memory only
   default_caplet: "passive_recon"
   caplets_path: "config/caplets"