Does StormService support HPA (Horizontal Pod Autoscaling) for each role within a RoleSet?

### 🚀 Feature Description and Motivation

Does StormService support HPA (Horizontal Pod Autoscaling) for each role within a RoleSet?
For example, applying HPA to the decode role.

Also, is there a WeChat group that I can join?

### Use Case

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### Proposed Solution

_No response_

Start by tracing StormService's RoleSet handling and its Kubernetes HPA configuration path; the issue names no files or tests. Compare current behavior with the requested decode-role example, then determine the design and validation needed for independent per-role autoscaling; done should establish whether this is supported and, if not, define the required implementation scope.

Written by the indexing model from the issue text.