refactor: 代码结构调整

server/internal/db/application/application.go

@@ -0,0 +1,16 @@
+package application
+
+import "mayfly-go/internal/db/infrastructure/persistence"
+
+var (
+	dbApp        Db        = newDbApp(persistence.GetDbRepo(), persistence.GetDbSqlRepo())
+	dbSqlExecApp DbSqlExec = newDbSqlExecApp(persistence.GetDbSqlExecRepo())
+)
+
+func GetDbApp() Db {
+	return dbApp
+}
+
+func GetDbSqlExecApp() DbSqlExec {
+	return dbSqlExecApp
+}