SPP Dark Launch - Timeout before the time runs out

What does this MR do and why?

This MR adds timeout protection to SPP dark launch to prevent it from exceeding the available time budget during git push operations.

During dark launch, SPP runs in the background to collect data without blocking pushes. However, if the validation takes too long, it can consume the entire time budget allocated for git hooks, potentially causing the push operation to timeout.

This change:

1. Checks if there's sufficient time remaining (at least 10 seconds) before starting the secrets check
2. Wraps dark launch in a Timeout.timeout block using the available time minus a 10-second buffer
3. Logs an error and skips SPP if insufficient time remains

This ensures SPP dark launch never causes git push timeouts, maintaining the principle that SPP should never block legitimate code from being pushed.

References

• SPP errors should never cause git push to fail (#569064) • Craig Smith • 18.6

Screenshots or screen recordings

Before	After

How to set up and validate locally

MR acceptance checklist

Evaluate this MR against the MR acceptance checklist. It helps you analyze changes to reduce risks in quality, performance, reliability, security, and maintainability.