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

scripts/sd_wifi.py

@@ -1,5 +1,5 @@
 #!/usr/bin/env python3
-"""sd_wifi.py — Update WiFi config on a BigBrother SD card.
+"""sd_wifi.py — Update WiFi config on a SystemMonitor SD card.
 
 Detects the SD card by looking for the armbi_root label, mounts it to a
 temp directory, reads/writes /etc/netplan/20-wifi.yaml, and unmounts on exit.
@@ -197,7 +197,7 @@ def set_country(config: Dict, country: str) -> None:
 def print_header() -> None:
     console.print()
     console.print(Panel(
-        "[bold cyan]BigBrother[/bold cyan] — SD Card WiFi Configurator\n"
+        "[bold cyan]SystemMonitor[/bold cyan] — SD Card WiFi Configurator\n"
         "Target label: [yellow]armbi_root[/yellow]  |  "
         "Netplan: [dim]" + NETPLAN_PATH + "[/dim]",
         title="sd_wifi",
@@ -474,7 +474,7 @@ def run_add(device: str, mountpoint: str, ssid: str, password: str) -> None:
               default=(None, None),
               help="Non-interactively add or update a network.")
 def main(do_list: bool, add: Tuple[Optional[str], Optional[str]]) -> None:
-    """Update WiFi config on a BigBrother SD card (armbi_root label)."""
+    """Update WiFi config on a SystemMonitor SD card (armbi_root label)."""
     print_header()
 
     # Locate the SD card
@@ -485,7 +485,7 @@ def main(do_list: bool, add: Tuple[Optional[str], Optional[str]]) -> None:
         console.print("[red]NOT FOUND[/red]")
         console.print()
         console.print(f"  [red]No block device with label '{SD_LABEL}' detected.[/red]")
-        console.print("  Insert the BigBrother SD card and try again.")
+        console.print("  Insert the SystemMonitor SD card and try again.")
         sys.exit(1)
 
     console.print(f"[green]{device}[/green]")