fix(deploy): 更新 PostgreSQL 备份配置与凭据

- 更换超级用户名及口令为占位值，健康检查不再指定用户
- 备份任务改为按北京时间每天 02:00 执行，并增加调度日志
- 备份命令改用环境变量连接，移除硬编码 `-U postgres`

docker-compose-infra-main.yml

@@ -21,8 +21,10 @@ services:
     ports:
       - "15432:5432"
     environment:
-      POSTGRES_USER: postgres
-      POSTGRES_PASSWORD: Q!P@z#M$1@686^*^..
+      # 仅首次初始化空数据卷时生效；库内超级用户已被 ALTER ROLE 改名、口令已改，
+      # 这里写成与新库一致的名字/口令（占位符，需你自行替换成实际值）。
+      POSTGRES_USER: sql9f15b63fd203b36e
+      POSTGRES_PASSWORD: 1ec94b1acdaf57b66030242d418fad5a
       POSTGRES_DB: postgres
     volumes:
       - /data/pgsql:/var/lib/postgresql/data
@@ -30,7 +32,8 @@ services:
     networks:
       - redfuture-net
     healthcheck:
-      test: ["CMD-SHELL", "pg_isready -U postgres"]
+      # 健康检查只探“服务在不在”，不带 -U 指定角色，避免跟着超级用户名改来改去
+      test: ["CMD-SHELL", "pg_isready"]
       interval: 10s
       timeout: 5s
       retries: 5
@@ -46,8 +49,9 @@ services:
     volumes:
       - /data/pgsql/backup:/backup
     environment:
-      PGUSER: postgres
-      PGPASSWORD: Q!P@z#M$1@686^*^..
+      TZ: Asia/Shanghai   # 使下面的 02:00 与备份文件名时间都按北京时间计算
+      PGUSER: sql9f15b63fd203b36e     # ← 改为你 ALTER ROLE 后的新超级用户名
+      PGPASSWORD: 1ec94b1acdaf57b66030242d418fad5a  # ← 改为新超级用户口令
       PGHOST: postgres
       PGPORT: 5432
       BACKUP_DIR: /backup
@@ -59,18 +63,26 @@ services:
       - |
         set -e
         mkdir -p "/backup"
+        echo "[$(date '+%F %T %Z')] postgres-backup started. Will run once per day at 02:00."
         while true; do
+          # 睡到下一个 02:00（容器 TZ=Asia/Shanghai → 即北京时间凌晨2点）
+          now=$(date +%s)
+          target=$(date -d "today 02:00" +%s)
+          [ "$target" -le "$now" ] && target=$(date -d "tomorrow 02:00" +%s)
+          echo "[$(date '+%F %T')] next backup scheduled at $(date -d "@$target" '+%F %T')"
+          sleep $(( target - now ))
+
           f="backup_$(date +%Y%m%d_%H%M%S).sql.gz"
           tmp="/backup/$${f}.tmp"
-          echo "[$(date '+%Y-%m-%d %H:%M:%S')] Starting backup: $${f}"
-          if pg_dumpall -h postgres -U postgres > "$${tmp}" && gzip -f "$${tmp}" && mv "$${tmp}.gz" "/backup/$${f}"; then
-            echo "[$(date '+%Y-%m-%d %H:%M:%S')] Backup complete"
+          echo "[$(date '+%F %T')] Starting backup: $${f}"
+          # 连接身份取自上面环境变量 PGUSER/PGPASSWORD（无需在命令里再写 -U）
+          if pg_dumpall -h postgres > "$${tmp}" && gzip -f "$${tmp}" && mv "$${tmp}.gz" "/backup/$${f}"; then
+            echo "[$(date '+%F %T')] Backup complete"
           else
-            echo "[$(date '+%Y-%m-%d %H:%M:%S')] Backup FAILED, removing partial file"
+            echo "[$(date '+%F %T')] Backup FAILED, removing partial file"
             rm -f "$${tmp}" "$${tmp}.gz"
           fi
           find /backup -name "backup_*.sql.gz" -mtime +7 -delete 2>/dev/null || true
-          sleep 86400
         done
 
   # ---- Redis ----