work: добавил каркас под управление вытяжкой!

app/exhaust/models.py

@@ -0,0 +1,25 @@
+from dataclasses import asdict, dataclass
+from datetime import datetime
+
+
+@dataclass(frozen=True, slots=True)
+class ExhaustState:
+    mqtt_connected: bool = False
+    device_online: bool = False
+
+    last_message_at: datetime | None = None
+
+    firmware: str | None = None
+    uptime_seconds: int | None = None
+
+    wifi_rssi: int | None = None
+
+    def to_dict(self) -> dict:
+        result = asdict(self)
+
+        if result["last_message_at"] is not None:
+            result["last_message_at"] = (
+                result["last_message_at"].isoformat()
+            )
+
+        return result