fix: enforce SAC git URL when updating ssh-monitor agents (0.20.8)

Pass REPO_URL/GIT_BRANCH from agent settings over SSH, preflight git remotes on stale hosts, and stop using GitHub origin on routers.

backend/app/services/ssh_connect.py

@@ -274,18 +274,46 @@ def probe_ssh_monitor_version(
     return None
 
 
-def _ssh_monitor_bootstrap_command(repo_url: str) -> str:
+def _ssh_monitor_preflight_git_remote(repo_url: str) -> str:
+    """Align clone remotes with SAC-trusted URL (works even before updater script is refreshed)."""
+    safe_repo = _shell_single_quote(repo_url.strip())
+    repo_dir = _shell_single_quote(f"{SSH_MONITOR_UPDATE_DIR}/{SSH_MONITOR_REPO_NAME}")
+    return (
+        f"if [ -d {repo_dir}/.git ]; then "
+        f"git -C {repo_dir} remote add kalinamall {safe_repo} 2>/dev/null || "
+        f"git -C {repo_dir} remote set-url kalinamall {safe_repo}; "
+        f"if git -C {repo_dir} remote get-url origin >/dev/null 2>&1; then "
+        f"git -C {repo_dir} remote set-url origin {safe_repo}; "
+        f"fi; fi"
+    )
+
+
+def _ssh_monitor_update_invoke_command(
+    repo_url: str,
+    *,
+    git_branch: str = "main",
+) -> str:
+    """Run installed updater with SAC-trusted git URL (overrides script default / stale origin)."""
+    safe_repo = _shell_single_quote(repo_url.strip())
+    safe_branch = _shell_single_quote((git_branch or "main").strip() or "main")
+    preflight = _ssh_monitor_preflight_git_remote(repo_url)
+    return f"{preflight}; REPO_URL={safe_repo} GIT_BRANCH={safe_branch} {SSH_MONITOR_UPDATE_SCRIPT}"
+
+
+def _ssh_monitor_bootstrap_command(repo_url: str, *, git_branch: str = "main") -> str:
     """Clone ssh-monitor repo and install updater when /opt/scripts/update_ssh_monitor.sh is absent."""
     safe_repo = repo_url.replace("\\", "\\\\").replace('"', '\\"')
+    safe_branch = (git_branch or "main").replace("\\", "\\\\").replace('"', '\\"')
     return (
         f'UPDATE_DIR="{SSH_MONITOR_UPDATE_DIR}";'
         f'REPO_URL="{safe_repo}";'
+        f'GIT_BRANCH="{safe_branch}";'
         f'SCRIPT_NAME="{SSH_MONITOR_REPO_NAME}";'
         f'INSTALL="{SSH_MONITOR_UPDATE_SCRIPT}";'
         f'mkdir -p "$UPDATE_DIR" && cd "$UPDATE_DIR" && '
-        f'([ -d "$SCRIPT_NAME" ] || git clone "$REPO_URL" "$SCRIPT_NAME") && '
+        f'([ -d "$SCRIPT_NAME" ] || git clone -b "$GIT_BRANCH" "$REPO_URL" "$SCRIPT_NAME") && '
         f'cp "$UPDATE_DIR/$SCRIPT_NAME/update_ssh_monitor.sh" "$INSTALL" && '
-        f'chmod 750 "$INSTALL" && "$INSTALL"'
+        f'chmod 750 "$INSTALL" && REPO_URL="$REPO_URL" GIT_BRANCH="$GIT_BRANCH" "$INSTALL"'
     )
 
 
@@ -295,9 +323,15 @@ def run_ssh_monitor_update(
     user: str,
     password: str,
     repo_url: str | None = None,
+    git_branch: str | None = None,
 ) -> SshCommandResult:
     script = SSH_MONITOR_UPDATE_SCRIPT
     effective_repo = (repo_url or SSH_MONITOR_UPDATE_REPO_URL).strip()
+    effective_branch = (git_branch or "main").strip() or "main"
+    update_cmd = _ssh_monitor_update_invoke_command(
+        effective_repo,
+        git_branch=effective_branch,
+    )
     check_cmd = f"test -x {script} && echo ready || echo missing"
     probe = run_ssh_command(
         target=target,
@@ -318,7 +352,10 @@ def run_ssh_monitor_update(
 
     bootstrapped = False
     if "missing" in probe.stdout:
-        bootstrap_cmd = _ssh_monitor_bootstrap_command(effective_repo)
+        bootstrap_cmd = _ssh_monitor_bootstrap_command(
+            effective_repo,
+            git_branch=effective_branch,
+        )
         updated = run_ssh_command(
             target=target,
             user=user,
@@ -333,7 +370,7 @@ def run_ssh_monitor_update(
             target=target,
             user=user,
             password=password,
-            remote_cmd=script,
+            remote_cmd=update_cmd,
             command_timeout_sec=900,
             need_root=True,
         )