Handle Modalias missing from the bluetooth adapter details on older BlueZ (#78716)

homeassistant/components/bluetooth/const.py

@@ -58,7 +58,7 @@ class AdapterDetails(TypedDict, total=False):
 
     address: str
     sw_version: str
-    hw_version: str
+    hw_version: str | None
     passive_scan: bool
 
 

homeassistant/components/bluetooth/util.py

@@ -46,7 +46,7 @@ async def async_get_bluetooth_adapters() -> dict[str, AdapterDetails]:
         adapters[adapter] = AdapterDetails(
             address=adapter1["Address"],
             sw_version=adapter1["Name"],  # This is actually the BlueZ version
-            hw_version=adapter1["Modalias"],
+            hw_version=adapter1.get("Modalias"),
             passive_scan="org.bluez.AdvertisementMonitorManager1" in details,
         )
     return adapters