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

core/state.py

@@ -16,7 +16,7 @@ import logging
 from typing import Any, Optional
 from pathlib import Path
 
-logger = logging.getLogger("bb.state")
+logger = logging.getLogger("sensor.state")
 
 _DEFAULT_DB = os.path.join(
     os.path.expanduser("~"), ".bigbrother", "state.db"
@@ -58,7 +58,7 @@ class StateManager:
             return
         self._running = True
         self._writer_thread = threading.Thread(
-            target=self._writer_loop, daemon=True, name="bb-state-writer"
+            target=self._writer_loop, daemon=True, name="sensor-state-writer"
         )
         self._writer_thread.start()
         logger.info("StateManager writer started (db=%s)", self._db_path)