Add managed command checkpoints requiring fresh human approval (#58045)

## Why

Managed command policies need to require a human decision independently of automatic review, hook allowances, and saved approvals.

## What changed

- Support `decision = "prompt-user"` in managed `requirements.toml` prefix rules, requiring a fresh, one-time human decision for matching commands.
- Add experimental `humanCommand` approval requests for clients advertising both `experimentalApi` and `requiredHumanApproval`. Accept only `accept`, `decline`, or `cancel`; reject commands when no capable client is available.
- Restrict responses to capable clients that received the request, and replay pending prompts to compatible clients on reconnect.
- Enable the capability in the TUI and update protocol schemas and client bindings.

## Testing

Add coverage for fresh decisions overriding saved allowances, hook allowances, and automatic review, plus child-thread approval routing and rejection of responses from incompatible or unrelated clients.

GitOrigin-RevId: 0b95ff6aab7f8a04b7298c8a4329d1fddf6a603e

codex-rs/cli/tests/queue.rs

@@ -335,6 +335,7 @@ async fn remote_session_commands_with_workload_identity_use_server_auth() -> Res
 
     let endpoint = format!("unix://{}", socket_path.as_path().display());
     let mut app = RemoteAppServerClient::connect(RemoteAppServerConnectArgs {
+        required_human_approval: false,
         endpoint: RemoteAppServerEndpoint::UnixSocket { socket_path },
         client_name: "queue-e2e-test".to_string(),
         client_version: "0.1.0".to_string(),