enhance(report):构建报表数据库相关功能文件。

repository/report.go

@@ -0,0 +1,19 @@
+package repository
+
+import (
+	"electricity_bill_calc/logger"
+
+	"github.com/doug-martin/goqu/v9"
+	_ "github.com/doug-martin/goqu/v9/dialect/postgres"
+	"go.uber.org/zap"
+)
+
+type _ReportRepository struct {
+	log *zap.Logger
+	ds  goqu.DialectWrapper
+}
+
+var ReportRepository = _ReportRepository{
+	log: logger.Named("Repository", "Report"),
+	ds:  goqu.Dialect("postgres"),
+}