feat(gitea): refactor configuration to use structured app_config and add TLS support

terraform/modules/apps/gitea/database.tf

@@ -2,9 +2,9 @@ module "gitea_database" {
   source = "../../db/mariadb"
 
   namespace = kubernetes_namespace.gitea.metadata[0].name
-  app_name  = "gitea"
+  app_name  = var.app_config.db_name
 
-  app_password  = var.db_password
+  app_password  = var.app_config.db_passwd
   root_password = var.db_root_password
 
   retention_days = var.backup_retention_days
@@ -12,4 +12,7 @@ module "gitea_database" {
 
   database_folder = local.gitea_db_path
   backup_folder   = var.backup_folder
+
+  tls_enabled = var.tls_enabled
+  issuer      = var.issuer
 }