Adding hpa in temporal

[synected]

What was changed

Why?

Checklist

1. Closes

2. How was this tested:

3. Any docs updates needed?

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[robholland]

Thanks for the submission. We don't recommend autoscaling the Temporal Server components, with the possible exception of Frontend. History and Matching services must rebalance themselves when pods are added or removed, so ideally they would be scaled to handle peak load rather than scaled up and down. If you would like to refactor this to only scale Frontend, I'm happy to review it.

[cancinar]

Hey @robholland, I would really appreciate it if you could elaborate on it a little bit more? Will this rebalancing of the History and Matching service happen automatically, or will they need to be scaled manually?