Update aedes to 1.x to resolve dependabot #676

Small rework on unit tests is required on how aedes is initialised

### Before (v0.x):
```js
const aedes = require('aedes')
const broker = aedes(opts)
```

### After (v1.0.0):
```js
const { Aedes } = require('aedes')
const broker = await Aedes.createBroker(opts)
```

_Originally posted by @Steve-Mcl in https://github.com/FlowFuse/device-agent/issues/676#issuecomment-5102773320_

> breaking changes in aedes 1.x
>
> https://github.com/moscajs/aedes/releases#release-v1.0.0
>
> Small rework on unit tests is required

Locate the aedes dependency and the unit tests that initialize the broker. Read the aedes 1.0.0 breaking changes, update the dependency, and adapt the test setup to the new asynchronous Aedes.createBroker API. Run the unit test suite; done means the tests pass with aedes 1.x.

Written by the indexing model from the issue text.