Add timeout support for HTTP fetch requests

[Copilot]

HTTP requests in fluent-ai could hang indefinitely without a timeout mechanism, causing jobs to stall on slow or unresponsive endpoints.

Changes

Core HTTP layer (src/job/http.ts)

• Added optional timeout parameter to createHTTPJob and downloadImages
• Implemented timeout using AbortController API
• Enhanced error messages to distinguish timeout from other failures

Schema (src/job/schema.ts)

• Extended optionsSchema with optional timeout: number field (milliseconds)

Provider runners (src/job/*.ts)

• Updated OpenAI, OpenRouter, Voyage, and Fal runners to pass timeout option from job options to HTTP layer

Tests (test/timeout.test.ts)

• Added unit tests for timeout behavior, error handling, and backward compatibility

Usage

import { openai, user } from "fluent-ai";

// Timeout applies to the entire request
const job = openai({ timeout: 5000 })
  .chat("gpt-4o-mini")
  .messages([user("Hi")]);

await job.run(); // Throws "HTTP request timed out after 5000ms" on timeout

The timeout is optional and backward compatible—existing code continues to work without modification.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• httpbin.org
  • Triggering command: bun test test/timeout.test.ts (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

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This section details on the original issue you should resolve

<issue_title>fetch with timeout error</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes fetch with timeout error #9

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