feat(calibration): complete step 1 data inspection with data quality v1

src/web/api/v1/routers/metrics.py

@@ -0,0 +1,11 @@
+# src/web/api/routers/metrics.py
+from fastapi import APIRouter, Depends
+from src.web.api.deps import get_provider
+from src.web.api.providers.base import StateProvider
+
+router = APIRouter(prefix="/metrics", tags=["metrics"])
+
+
+@router.get("")
+def metrics(provider: StateProvider = Depends(get_provider)):
+    return provider.get_metrics() or {}