fix(llm+worker+deploy): 兼容老 prompt 模板 + 消除 startup_run 日志噪音

- enrichment: 新增 _safe_format (基于 _SafeDict),缺失占位符保留原样不抛 KeyError。
  _enrich_format / _enrich_classify / _enrich_image / _enrich_commentary
  全部走 _safe_format,数据库里老 prompt(不支持 {body})不再让整条 article 卡住。
  复现: 388183 classify 一直 KeyError,enrichment_loop 反复重试它,316 篇全卡在 n/a。
- workers.__main__: startup_run 从 IntervalTrigger(minutes=0) 改成 DateTrigger
  (只跑一次),消除 'maximum number of running instances reached' 刷屏 WARNING。
- deploy_pull: 改 _connect 自动识别 RSA / Ed25519 / ECDSA key(原硬编码 Ed25519Key)

scripts/deploy_pull.py

@@ -44,7 +44,17 @@ def _run(c: paramiko.SSHClient, cmd: str, timeout: int = 60) -> tuple[int, str,
 
 
 def _connect(host: str, port: int, user: str, ssh_key: str) -> paramiko.SSHClient:
-    pkey = paramiko.Ed25519Key.from_private_key_file(ssh_key)
+    # 依次尝试 RSA / Ed25519 / ECDSA(paramiko 5 没有统一入口)
+    pkey: Any = None
+    last_err: Exception | None = None
+    for loader in (paramiko.RSAKey, paramiko.Ed25519Key, paramiko.ECDSAKey):
+        try:
+            pkey = loader.from_private_key_file(ssh_key)
+            break
+        except Exception as e:
+            last_err = e
+    if pkey is None:
+        raise RuntimeError(f"无法解析 SSH key {ssh_key}: {last_err}")
     c = paramiko.SSHClient()
     c.set_missing_host_key_policy(paramiko.AutoAddPolicy())
     c.connect(host, port=port, username=user, pkey=pkey, timeout=30,