feat: enhance db-wrapper with improved MSSQL and Postgres implementations; add row result handling and dialect support

internal/app/db-wrapper/main.go

@@ -2,12 +2,17 @@ package dbwrapper
 
 import "fmt"
 
+const (
+	postgresDialect = "postgres"
+	mssqlDialect    = "sqlserver"
+)
+
 func NewWrapper(driverType string) (DbWrapper, error) {
 	switch driverType {
-	case "postgres":
-		return &postgresDbWrapper{}, nil
-	case "sqlserver":
-		return &mssqlDbWrapper{}, nil
+	case postgresDialect:
+		return &postgresDbWrapper{dialect: postgresDialect}, nil
+	case mssqlDialect:
+		return &mssqlDbWrapper{dialect: mssqlDialect}, nil
 	default:
 		return nil, fmt.Errorf("driver not yet supported: %s", driverType)
 	}