feat: config fallback timeout

[aaa123eee]

What is it?

• [x] Feature / enhancement
• [ ] Bug
• [ ] Docs / tests

Description

Currently, fallback timeout is hardcoded with 9999. It would be nice to have it configurable

Use cases and why

• 1. Developers desired to execute 3rd parties ASAP and don't want to wait 10s
• 2. Developers want to run 3rd parties in worker as much as possible and can wait more

Checklist:

• [x] My code follows the developer guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have made corresponding changes to the documentation
• [ ] Added new tests to cover the fix / functionality