Allow CPU bursts for Node-RED pods

### Epic

_No response_

### Description

**As an:** administrator of FlowFuse

**I want to:** allow CPU bursts

**So that:** the user gets to use FlowFuse / Node-RED faster and the server has higher CPU utilization

### Acceptance Criteria

_No response_

No files, tests, or entry points are named. Start by locating where the driver defines Kubernetes pod CPU requests and limits, then clarify the intended burst behavior and add coverage for the agreed resource configuration; done means Node-RED pods can temporarily use available CPU without violating the selected limits.

Written by the indexing model from the issue text.