feat: bootstrap ssh-monitor updater when missing on host (0.20.2)

SAC now clones the ssh-monitor repo and installs update_ssh_monitor.sh before running the update when the remote updater script is absent.

backend/app/api/v1/hosts.py

@@ -4,6 +4,7 @@ from sqlalchemy import func, select
 from sqlalchemy.orm import Session
 
 from datetime import datetime, timezone
+from functools import partial
 
 from app.auth.jwt_auth import get_current_user, require_admin
 from app.config import get_settings
@@ -412,7 +413,13 @@ def update_host_agent_via_ssh(
     if not cfg.configured:
         raise HTTPException(status_code=400, detail="Linux SSH admin is not configured")
 
-    response = _run_ssh_action_on_host(host, cfg, action=run_ssh_monitor_update)
+    agent_cfg = get_effective_agent_update_config(db)
+    repo_url = (agent_cfg.ssh_git_repo_url or "").strip() or None
+    response = _run_ssh_action_on_host(
+        host,
+        cfg,
+        action=partial(run_ssh_monitor_update, repo_url=repo_url),
+    )
     _set_ssh_admin_status(host, response.ok)
     if response.ok and response.product_version:
         host.product_version = response.product_version