fix(rate-limit): do not increase rate limit counter when consuming a deferred failure

[roggervalf]

Why

1. Why is this change necessary? When consuming a deferred failure, rate limit is increased when it's not needed in this case. As we are not processing but failing only

How

Enter the implementation details here.

Additional Notes (Optional)

Any extra info here.

[Copilot]

Pull Request Overview

This PR fixes a rate limiting issue where the rate limit counter was incorrectly being incremented when processing deferred failures. The change ensures that jobs with deferred failures bypass rate limiting since they are failing rather than being actively processed.

• Adds logic to check for deferred failures before applying rate limiting
• Introduces a helper function to extract deferred failure information from job attributes
• Adds comprehensive test coverage for the parent-child job failure scenario

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
src/commands/includes/prepareJobForProcessing.lua	Implements the core fix by checking for deferred failures before incrementing rate limit counter
tests/test_rate_limiter.ts	Adds test case to verify rate limit counter is not incremented when consuming deferred failures
src/commands/getRateLimitTtl-1.lua	Adds TODO comment about inconsistent return values