Victron GX: Add exception translations (#168762)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

homeassistant/components/victron_gx/hub.py

@@ -89,11 +89,15 @@ class Hub:
             await self._hub.connect()
         except AuthenticationError as auth_error:
             raise ConfigEntryAuthFailed(
-                f"Authentication failed for {self.host}: {auth_error}"
+                translation_domain=DOMAIN,
+                translation_key="authentication_failed",
+                translation_placeholders={"host": self.host},
             ) from auth_error
         except CannotConnectError as connect_error:
             raise ConfigEntryNotReady(
-                f"Cannot connect to the hub at {self.host}: {connect_error}"
+                translation_domain=DOMAIN,
+                translation_key="cannot_connect",
+                translation_placeholders={"host": self.host},
             ) from connect_error
 
     async def stop(self) -> None:

homeassistant/components/victron_gx/quality_scale.yaml

@@ -57,7 +57,7 @@ rules:
   entity-device-class: done
   entity-disabled-by-default: done
   entity-translations: done
-  exception-translations: todo
+  exception-translations: done
   icon-translations:
     status: exempt
     comment: |

homeassistant/components/victron_gx/strings.json

@@ -1977,5 +1977,13 @@
         "name": "ESS BatteryLife schedule charge {slot} start"
       }
     }
+  },
+  "exceptions": {
+    "authentication_failed": {
+      "message": "Authentication failed for {host}."
+    },
+    "cannot_connect": {
+      "message": "Cannot connect to the GX device at {host}."
+    }
   }
 }