refacto: rename app into backend, to prepare for frontend dev

server/backend/adapters/http/readings.py

@@ -0,0 +1,30 @@
+from datetime import datetime
+from typing import Annotated
+
+from fastapi import APIRouter, Depends, Query, HTTPException
+
+from domain.value_objects import Granularity
+from domain.exceptions import ValidationError, DatabaseError
+from services.consumption_service import ConsumptionService
+from dependencies import get_consumption_service
+
+from ._readings_schemas import ConsumptionResponseSchema
+
+readings_router = APIRouter(prefix="/readings", tags=["readings"])
+
+
+@readings_router.get("/{dev_eui}", response_model=ConsumptionResponseSchema)
+def get_consumption(
+    dev_eui: str,
+    start: Annotated[datetime, Query()],
+    end: Annotated[datetime, Query()],
+    granularity: Annotated[Granularity, Query()] = "day",
+    service: ConsumptionService = Depends(get_consumption_service),
+):
+    try:
+        result = service.get_consumption(dev_eui, start, end, granularity)
+        return ConsumptionResponseSchema.from_domain(result)
+    except ValidationError as e:
+        raise HTTPException(status_code=422, detail=str(e))
+    except DatabaseError as e:
+        raise HTTPException(status_code=500, detail=str(e))