chore: remove plaintext postgres retry credentials

heicode/.retry_pg.sh

@@ -1,13 +1,13 @@
 #!/usr/bin/env bash
-set -e
-export PGHOST=heicode.postgres.database.azure.com
-export PGPORT=5432
-export PGDATABASE=heicode
-export PGPASSWORD="Myadmin@123456."
-export PGSSLMODE=require
+set -euo pipefail
 
-echo "[try-1] PGUSER=heicode"
-PGUSER=heicode psql -c "select current_user, current_database();" || true
+# Local PostgreSQL retry helper.
+# Do not store real credentials in this file. Supply them through the shell
+# environment or a secret manager before running it.
+: "${PGHOST:?PGHOST is required}"
+: "${PGUSER:?PGUSER is required}"
+: "${PGPORT:=5432}"
+: "${PGDATABASE:?PGDATABASE is required}"
+: "${PGPASSWORD:?PGPASSWORD is required}"
 
-echo "[try-2] PGUSER=heicode@heicode"
-PGUSER='heicode@heicode' psql -c "select current_user, current_database();" || true
+psql "sslmode=require host=${PGHOST} port=${PGPORT} user=${PGUSER} dbname=${PGDATABASE}"