feat: add API endpoint to get devices list

server/backend/adapters/http/_devices_schemas.py

@@ -0,0 +1,10 @@
+from pydantic import BaseModel
+
+from domain.entities import Device
+
+class DeviceResponseSchema(BaseModel):
+    device_eui: str
+
+    @classmethod
+    def from_domain(cls, device: Device) -> "DeviceResponseSchema":
+        return cls(device_eui=device.device_eui)