Add requires_capture_bus attribute to BaseModule and passive modules

- BaseModule now has requires_capture_bus = False default
- All 17 passive modules set requires_capture_bus = True
- bigbrother.py imports CaptureBus from core.capture_bus
- Ready for Engine to instantiate and inject CaptureBus

modules/passive/packet_capture.py

@@ -34,6 +34,7 @@ class PacketCapture(BaseModule):
     name = "packet_capture"
     module_type = "passive"
     priority = 50
+    requires_capture_bus = True
     requires_root = True
 
     # Defaults