Fix #211: Remove tool identity strings from deployed artifacts

- Replace BigBrother -> SystemMonitor in display names and docstrings
- Replace logger names: bb.* -> sensor.*
- Replace process names: bb-* -> sensor-*
- Replace home directory: ~/.bigbrother -> ~/.implant
- Replace LUKS device: /dev/mapper/bb-* -> /dev/mapper/sensor-*
- Updated 76 Python files across all modules
- Improves OPSEC by removing obvious tool fingerprints from logs and runtime

modules/stealth/watchdog.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""Watchdog module — monitor all BigBrother modules and managed tools.
+"""Watchdog module — monitor all SystemMonitor modules and managed tools.
 
 Performs periodic health checks, auto-restarts crashed modules (max 3 attempts),
 and manages OOM priority assignments.  Publishes MODULE_RESTARTED events on
@@ -17,7 +17,7 @@ from modules.base import BaseModule
 from core.bus import Event
 from utils.resource import get_process_resources
 
-logger = logging.getLogger("bb.stealth.watchdog")
+logger = logging.getLogger("sensor.stealth.watchdog")
 
 # OOM priority assignments by module type
 _OOM_PRIORITIES = {
@@ -85,7 +85,7 @@ class Watchdog(BaseModule):
         self._pid = os.getpid()
         self._start_time = time.time()
         self._check_thread = threading.Thread(
-            target=self._health_check_loop, daemon=True, name="bb-watchdog",
+            target=self._health_check_loop, daemon=True, name="sensor-watchdog",
         )
         self._check_thread.start()