Docker an k8s drivers don't support pointing to sha hash container ids

### Current Behavior

Docker and k8s drivers both have regex to validate container names with tags

e.g. `flowfuse/node-red:latest` or `flowfuse/node-red:v1.32.4`

But they do not support permanent sha identifiers

e.g. `flowfuse/node-red@sha256:384b5689928f432bd5fcbd9d7c0ea244e080da3fe9b3adad8274e0885ebba75f`

### Expected Behavior

static id's should be supported

### Steps To Reproduce

NA

### Environment

- FlowFuse version: 2.34.x
- Node.js version: 24
- npm version: 10
- Platform/OS: k8s/docker
- Browser: NA

### Have you provided an initial effort estimate for this issue?

I have provided an initial effort estimate