diff --git a/docker-compose.yml b/docker-compose.yml
index 498f085..bcd8db6 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -151,10 +151,19 @@ services:
       - MESHSAFE_ENV=prod
       - MESHSAFE_DB_URL=postgresql+psycopg2://meshsafe:${MESHSAFE_DB_PASSWORD:-meshsafe}@postgres:5432/meshsafe
       - MESHSAFE_MASTER_KEY=${MESHSAFE_MASTER_KEY:?MASTER_KEY_REQUIRED}
+      # cron 不做控制台认证，但 Settings.admin_password 是必填字段，缺它 get_settings()
+      # 就抛 ValidationError，归档与 VACUUM 全崩。给占位值，不把真实口令复制进 cron
+      # 容器环境（docker inspect 可见）。
+      - MESHSAFE_ADMIN_PASSWORD=cron-unused-placeholder
     volumes:
       - ./data/logs:/var/log/meshsafe      # 归档日志共享目录
       - ./scripts:/app/scripts:ro          # archive_old_tasks.py + cron_entrypoint.py
     entrypoint: ["python3", "/app/scripts/cron_entrypoint.py"]
+    # 镜像层的 HEALTHCHECK 探测 localhost:8443（API 服务端口），cron 容器不监听该端口，
+    # 因此状态恒为 unhealthy —— 真正调度器挂掉时这个信号完全失效。关掉它，
+    # 存活与否由 restart: unless-stopped + 日志判断。
+    healthcheck:
+      disable: true
 
   # ---------- Nginx（反向代理，内网 HTTP 明文）----------
   # 外部端口 44380 → 内部 80 → api:8443
diff --git a/scripts/cron_entrypoint.py b/scripts/cron_entrypoint.py
index 92850cc..1b64ba2 100644
--- a/scripts/cron_entrypoint.py
+++ b/scripts/cron_entrypoint.py
@@ -25,6 +25,20 @@ logging.basicConfig(
 log = logging.getLogger("scheduler")
 
 
+_SECRET_ENV_KEYS = ("MESHSAFE_DB_URL", "MESHSAFE_MASTER_KEY", "MESHSAFE_ADMIN_PASSWORD",
+                    "MESHSAFE_API_KEY", "MESHSAFE_API_CLIENTS")
+
+
+def _redact(text: str) -> str:
+    """崩溃日志里 pydantic 会把整个 settings dict（含 DB 口令）原样打出来，落盘前抹掉。"""
+    out = text
+    for key in _SECRET_ENV_KEYS:
+        val = os.environ.get(key, "")
+        if val and len(val) >= 8:
+            out = out.replace(val, "***")
+    return out
+
+
 def run(cmd: list[str], label: str) -> None:
     """跑一个命令，捕获输出并记日志。"""
     log.info(f"[{label}] 开始执行: {' '.join(cmd)}")
@@ -32,10 +46,10 @@ def run(cmd: list[str], label: str) -> None:
         proc = subprocess.run(cmd, capture_output=True, text=True, timeout=1800)
         if proc.stdout:
             for line in proc.stdout.strip().splitlines():
-                log.info(f"[{label}] {line}")
+                log.info(f"[{label}] {_redact(line)}")
         if proc.stderr:
             for line in proc.stderr.strip().splitlines():
-                log.warning(f"[{label}] {line}")
+                log.warning(f"[{label}] {_redact(line)}")
         if proc.returncode == 0:
             log.info(f"[{label}] ✅ 完成")
         else:
@@ -47,7 +61,11 @@ def run(cmd: list[str], label: str) -> None:
 
 
 def run_vacuum() -> None:
-    """VACUUM ANALYZE — 维护表统计信息。"""
+    """VACUUM ANALYZE — 维护表统计信息。
+
+    VACUUM 不能在事务块里跑（psycopg2 会抛 ActiveSqlTransaction），
+    所以用 AUTOCOMMIT 连接而不是 engine.begin()。
+    """
     try:
         from app.db import engine
         from sqlalchemy import text
@@ -57,13 +75,14 @@ def run_vacuum() -> None:
             "scan_findings", "idempotency_records",
             "policy_versions", "audit_logs",
         ]
-        with engine.begin() as conn:
+        with engine.connect() as raw:
+            conn = raw.execution_options(isolation_level="AUTOCOMMIT")
             for tbl in tables:
                 log.info(f"[VACUUM] {tbl} ...")
                 conn.execute(text(f"VACUUM ANALYZE {tbl}"))
         log.info("[VACUUM] ✅ 全部完成")
     except Exception as e:
-        log.error(f"[VACUUM] ❌ 异常: {e}")
+        log.error(f"[VACUUM] ❌ 异常: {_redact(str(e))}")
 
 
 def seconds_until(target_hour: int, target_minute: int, weekday: int | None = None) -> float: