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/vlan_discovery.py

@@ -113,6 +113,7 @@ class VLANDiscovery(BaseModule):
         # Broad filter: we need 802.1Q (any ethertype), CDP/DTP (SNAP), LLDP, STP, EAPOL
         # Compile a catch-all because these span multiple ethertypes and LLC frames
         self._sub_queue = self._capture_bus.subscribe(
+    requires_capture_bus = True
             name=self.name, bpf_filter="", queue_depth=3000
         )