websocket implementation

[siddarthvader]

moved from http networking to websockets for hooks invocation rather we have bidirectional communication now between compiler and orchestrator. There is no schema change, DB already has a column for port in plugin table.

We maintain a map of websocket connection, and we keep an account of pending request, this is still request-response model nothing inherent has changed just the networking layer is websocket now.

This improved upon the existing http netwroking, now our golang process can send message to orchestrator (posing as websocket client) there is a simple interface for messages implemented.

Right now we dont send a lot of info from compiler using the websockets, only sending critical errors propagating in hook invocation and their success message.

Earlier we sent taskId and pluginDir as headers

{
  method: 'POST',
  headers: {
	  'Content-Type': 'application/json',
	  'X-Task-ID': task_id?.toString() ?? '',
	  'X-Plugin-Directory': directory,
  },
  body: JSON.stringify(payload),
},

type WebSocketMessage struct {
	ID              string         `json:"id"`
	Type            string         `json:"type"`
	Hook            string         `json:"hook"`
	Payload         map[string]any `json:"payload"`
	TaskID          string         `json:"taskId"`
	PluginDirectory string         `json:"pluginDirectory"`
}

Now we can just send them as regular payload.

We have a lot of errors already propagated to hook layer and then being sent to client, looks somewhat liks this

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[AlecAivazis]

Overall this looks really good! It's a significant upgrade from the current setup so thanks for pushing on this.

[siddarthvader]

@AlecAivazis fixes pushed for all comments, kindly review.

[AlecAivazis]

let's remove the _websocket and stick with just invoke_hook since there is only a websocket version now

[siddarthvader]

done