This introduces a linter to PRs to help with code reviews and code hygiene. I've also gone ahead and fixed (or ignored) the existing lints.
I've only setup the default linters right now. There are many more options that are documented at https://golangci-lint.run/.
The GitHub Action should add appropriate annotations to the lint job for the PR. Contributors can also lint locally using `make lint`.
* Make webhook-based scale operation asynchronous
This prevents race condition in the webhook-based autoscaler when it received another webhook event while processing another webhook event and both ended up
scaling up the same horizontal runner autoscaler.
Ref #1321
* Fix typos
* Update rather than Patch HRA to avoid race among webhook-based autoscaler servers
* Batch capacity reservation updates for efficient use of apiserver
* Fix potential never-ending HRA update conflicts in batch update
* Extract batchScaler out of webhook-based autoscaler for testability
* Fix log levels and batch scaler hang on start
* Correlate webhook event with scale trigger amount in logs
* Fix log message
Cory Miller
Yusuke Kuoka