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/tmpfs_manager.py

@@ -16,7 +16,7 @@ from typing import Dict, List, Optional, Tuple
 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.tmpfs_manager")
+logger = logging.getLogger(__name__)
 
 # Default tmpfs size limits per tier (MB)
 _TIER_TMPFS_LIMITS = {