generator-ai Error: Load model (Protobuf parsing failed)

### I tried this:

Hi, I'm unable to use the generator-api plugin (with google)

## With google config only

When supplying a google api key, the generator fails, complaining that we don't have an openapi key, even though I'm not wanting to use it with openapi.

`npm run generate`

.env:
```
GOOGLE_GENERATIVE_AI_API_KEY=[MY GOOGLE KEY]
```

> Error loading plugin: OpenAIError: The OPENAI_API_KEY environment variable is missing or empty; either provide it, or instantiate the OpenAI client with an apiKey option, like new OpenAI({ apiKey: 'My API Key' }).
at new OpenAI (/Users/tom/workspace/zap-middleware/eventcatalog/node_modules/openai/index.js:72:19)
at Object. (/Users/tom/workspace/zap-middleware/eventcatalog/node_modules/@eventcatalog/core/node_modules/@eventcatalog/generator-ai/dist/index.js:1207:14)

## With some dummy value for openapi:

If I add some dummy value for the open api key, I get a different error:

`npm run generate`

.env:
```
OPENAI_API_KEY=dummy
GOOGLE_GENERATIVE_AI_API_KEY=[MY GOOGLE KEY]
```

> @eventcatalog/generator-ai processing your catalog...
- Splitting markdown documents...
Error loading plugin: Error: Load model from /Users/tom/workspace/zap-middleware/eventcatalog/node_modules/@huggingface/transformers/.cache/Xenova/all-MiniLM-L6-v2/onnx/model.onnx failed:Protobuf parsing failed.
at new OnnxruntimeSessionHandler (/Users/tom/workspace/zap-middleware/eventcatalog/node_modules/onnxruntime-node/dist/backend.js:24:92)
at Immediate. (/Users/tom/workspace/zap-middleware/eventcatalog/node_modules/onnxruntime-node/dist/backend.js:64:29)
at process.processImmediate (node:internal/timers:483:21)

### This happened:

I'm unable to se the chat plugin (generator-ai) with a Google API key. It requires an OpenAPI key. Using a dummy value for the open api key then results in an error.

### I expected this:

I expect to be able to use the chat plugin (generator-ai) with a Google API key.

### Is there a workaround?

_No response_

### Anything else?

My config:

```js
{
generators: [
[
"@eventcatalog/generator-ai", {
splitMarkdownFiles: true,
includeUsersAndTeams: false,
includeSchemas: true,
includeCustomDocumentation: false
},
],
],
chat: {
enabled: true,
provider: 'google',
model: 'gemini-2.5-flash-preview-04-17',
},
output: 'server'
}
```

### EventCatalog Version

2.42.1

### Node.js Version

v20.18.1

### Platform(s)

MacOS

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