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

modules/stealth/overlayfs_manager.py

@@ -13,7 +13,7 @@ from typing import Optional
 from modules.base import BaseModule
 from utils.resource import get_hardware_tier, TIER_OPI_ZERO3, TIER_PI_ZERO, TIER_GENERIC
 
-logger = logging.getLogger("sensor.stealth.overlayfs_manager")
+logger = logging.getLogger(__name__)
 
 # Default overlay paths
 OVERLAY_BASE = "/opt/.cache/bb/overlay"