P.S.A. Validation throughput

[denelon]

We've been experiencing throughput issues with our validation infrastructure.

We do have work in progress to directly help as well as longer term work to address the root cause. The initial work is moving to a GitHub App and implementing a queueing mechanism so we can throttle our traffic to reduce the number of failures based on timeouts.

• Use GitHub App integration for validation #263724
• [New Feature]: Improve queueing/scheduling for Validation pipelines #185545

Longer term, we're working with our infrastructure partner on increasing our overall capacity as well as the compute resources we run validation against.