fix: 마이그레이션 작업을 위한 rds 주소 output 추가

Author: lvalentine6

terraform/prod/outputs.tf

@@ -40,3 +40,9 @@ output "rds_instance_id" {
   value     = module.rds.rds_instance_id
   sensitive = true
 }
+
+output "rds_instance_address" {
+  description = "The endpoint address of the production RDS instance."
+  value       = module.rds.rds_instance_address
+  sensitive   = true
+}

terraform/prod/rds/outputs.tf

@@ -16,3 +16,8 @@ output "rds_instance_identifier" {
 output "rds_instance_id" {
   value = aws_db_instance.prod.id
 }
+
+output "rds_instance_address" {
+  description = "The endpoint address of the production RDS instance."
+  value       = aws_db_instance.prod.address
+}