Updated the normalized observation schema to remove duplicate and/or unnecessary fields

internal/normalizers/openmeteo/observation_test.go

@@ -0,0 +1,61 @@
+package openmeteo
+
+import "testing"
+
+func TestBuildObservationTextDescriptionAndPressurePrecedence(t *testing.T) {
+	weatherCode := 2
+	pressureMSL := 1016.0
+	surfacePressure := 1009.0
+
+	parsed := omResponse{
+		Timezone:         "UTC",
+		UTCOffsetSeconds: 0,
+		Current: omCurrent{
+			Time:            "2026-03-16T19:00",
+			WeatherCode:     &weatherCode,
+			PressureMSL:     &pressureMSL,
+			SurfacePressure: &surfacePressure,
+		},
+	}
+
+	obs, _, err := buildObservation(parsed)
+	if err != nil {
+		t.Fatalf("buildObservation() error = %v", err)
+	}
+
+	if got, want := obs.TextDescription, "Partly Cloudy"; got != want {
+		t.Fatalf("TextDescription = %q, want %q", got, want)
+	}
+
+	if obs.BarometricPressurePa == nil {
+		t.Fatalf("BarometricPressurePa = nil, want non-nil")
+	}
+	if got, want := *obs.BarometricPressurePa, 101600.0; got != want {
+		t.Fatalf("BarometricPressurePa = %v, want %v", got, want)
+	}
+}
+
+func TestBuildObservationPressureFallbackToSurface(t *testing.T) {
+	surfacePressure := 1008.0
+
+	parsed := omResponse{
+		Timezone:         "UTC",
+		UTCOffsetSeconds: 0,
+		Current: omCurrent{
+			Time:            "2026-03-16T19:00",
+			SurfacePressure: &surfacePressure,
+		},
+	}
+
+	obs, _, err := buildObservation(parsed)
+	if err != nil {
+		t.Fatalf("buildObservation() error = %v", err)
+	}
+
+	if obs.BarometricPressurePa == nil {
+		t.Fatalf("BarometricPressurePa = nil, want non-nil")
+	}
+	if got, want := *obs.BarometricPressurePa, 100800.0; got != want {
+		t.Fatalf("BarometricPressurePa = %v, want %v", got, want)
+	}
+}