Allow the prompt request to specify the prompt ID.

This makes it easier to write asynchronous clients that submit requests, because they can store the task immediately.

Author: FeepingCreature

server.py

@@ -652,7 +652,7 @@ async def post_prompt(request):
                 if "client_id" in json_data:
                     extra_data["client_id"] = json_data["client_id"]
                 if valid[0]:
-                    prompt_id = str(uuid.uuid4())
+                    prompt_id = json_data.get("prompt_id", str(uuid.uuid4()))
                     outputs_to_execute = valid[2]
                     self.prompt_queue.put((number, prompt_id, prompt, extra_data, outputs_to_execute))
                     response = {"prompt_id": prompt_id, "number": number, "node_errors": valid[3]}