add support for barometric pressure

internal/db/queries.go

@@ -122,3 +122,27 @@ func (d *DB) UpsertOpenMeteoHourly(ctx context.Context, p InsertOpenMeteoHourlyP
 
 	return err
 }
+
+type InsertBarometerParams struct {
+	TS          time.Time
+	Site        string
+	Source      string
+	PressureHPA float64
+	Payload     map[string]any
+}
+
+func (d *DB) InsertBarometer(ctx context.Context, p InsertBarometerParams) error {
+	b, _ := json.Marshal(p.Payload)
+
+	payloadJSON := json.RawMessage(b)
+
+	_, err := d.Pool.Exec(ctx, `
+		INSERT INTO observations_baro (
+			ts, site, source, pressure_hpa, payload_json
+		) VALUES (
+			$1,$2,$3,$4,$5
+		)
+	`, p.TS, p.Site, p.Source, p.PressureHPA, payloadJSON)
+
+	return err
+}