fix: parallelized IT

[Weves]

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Project	Deployment	Preview	Comments	Updated (UTC)
internal-search	Ready	Preview	Comment	Sep 10, 2025 9:03pm

[greptile-apps]

Greptile Summary

This PR adds Docker Hub authentication to the MIT integration tests workflow (pr-mit-integration-tests.yml) to prevent Docker Hub rate limiting issues. The change adds a Docker Hub login step using stored secrets (DOCKER_USERNAME and DOCKER_TOKEN) before pulling third-party images like Vespa, Redis, Postgres, and Minio.

The authentication step is added specifically to the integration-tests-mit job, which uses a matrix strategy to run tests in parallel across multiple discovered test directories. This parallelized approach makes Docker Hub rate limiting more likely to occur since multiple concurrent jobs are pulling images simultaneously, hitting Docker Hub's "Unauthenticated users" limit more quickly.

This change mirrors the existing authentication pattern already implemented in the standard integration tests workflow (pr-integration-tests.yml), creating consistency between the two workflows. The fix addresses a specific infrastructure issue where the parallelized nature of the MIT tests amplifies Docker Hub's rate limiting problem, ensuring test reliability.

PR Description Notes:

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Confidence score: 5/5

• This PR is extremely safe to merge with minimal risk of issues
• Score reflects a simple, well-understood infrastructure fix that mirrors existing patterns
• No files require special attention as this is a standard Docker Hub authentication addition

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