Handle when the embedding service is out of GPUs

[Jonathan-Adly]

When the embedding service is out of GPUs. We get an error message:

['Failed to save pages: ["Failed to get embeddings from the embeddings service. Repsonse: {'id': 'sync-4bb0e1d2-d4b4-4ed8-9236-40826f9542d8-u1', 'status': 'IN_QUEUE'}"]']

We want to handle this via webhooks: https://docs.runpod.io/serverless/endpoints/send-requests. Probably will be simpler if we handle all ingestion requests to the embeddings service via webhooks

{
  "input": {},
  "webhook": "https://URL.TO.YOUR.WEBHOOK"
}

This is a rare bug, so priority is low.