Treat inference hook denials as terminal errors (#60511)

## Why

An explicit denial from a workspace inference hook should stop the request, including retries and compaction model fallback.

## What changed

Recognize `inference_hook_denied` provider errors and preserve the provider's message, with a fallback when none is supplied. Expose the distinct `inferenceHookDenied` error through the app-server protocol and generated schemas and SDK types. Treat the denial as non-retryable during turns, compaction, and guardian review.

## Testing

Add coverage for terminal denials over HTTP, SSE, and WebSocket, error serialization and persistence in `thread/read`, and compaction failures that preserve token usage and history without retrying or falling back to another model.

GitOrigin-RevId: 2ebd480f01e52f4e6bd3db8a0f92d5814d18ccb1

codex-rs/cli/src/doctor.rs

@@ -2534,6 +2534,9 @@ fn websocket_error_detail(err: &ApiError) -> String {
             "handshake error: model not found: [redacted]".to_string()
         }
         ApiError::InvalidPrompt { .. } => "handshake error: invalid prompt: [redacted]".to_string(),
+        ApiError::InferenceHookDenied { .. } => {
+            "handshake error: inference hook denied: [redacted]".to_string()
+        }
         ApiError::ContentPolicyViolation { .. } => {
             "handshake error: content policy violation".to_string()
         }