Do not crash stream connectors when Live Streams are not started

[gileri]

Use case

Currently stream connectors crash at startup when the associated stream is stopped :

{"timestamp": "2024-12-20T09:21:31.489309Z", "level": "ERROR", "name": "Microsoft Sentinel", "message": "Error in ListenStream loop, exit.", "exc_info": "Traceback (most recent call last):\n  File \"/usr/local/lib/python3.11/site-packages/pycti/connector/opencti_connector_helper.py\", line 627, in run\n    messages = SSEClient(\n               ^^^^^^^^^^\n  File \"/usr/local/lib/python3.11/site-packages/filigran_sseclient/sseclient.py\", line 63, in __init__\n    self._connect()\n  File \"/usr/local/lib/python3.11/site-packages/filigran_sseclient/sseclient.py\", line 82, in _connect\n    self.resp.raise_for_status()\n  File \"/usr/local/lib/python3.11/site-packages/requests/models.py\", line 1024, in raise_for_status\n    raise HTTPError(http_error_msg, response=self)\nrequests.exceptions.HTTPError: 410 Client Error: This live stream is stopped for url: http://127.0.0.1:80/stream/675e6270-9e92-4189-8515-7972916a7e56?recover=2024-12-20T09:21:31Z", "attributes": {"reason": "410 Client Error: This live stream is stopped for url: http://127.0.0.1:80/stream/675e6270-9e92-4189-8515-7972916a7e56?recover=2024-12-20T09:21:31Z"}}
Terminated

Current Workaround

The connector crashes, and then gets restarted by the orchestration (docker/podman, kubernetes etc.)

Proposed Solution

Add an infinite retry loop that waits for the stream to be started, with an info/debug log explaining the situation.

Additional Information

Would you be willing to submit a PR?

As this span between pytcti, and multiple connectors, I thinks it's best to let someone more knowledgeable tackle this, if it's something we want to do.

We strongly encourage you to submit a PR if you want and whenever you want. If your issue concern a "Community-support" connector, your PR will probably be accepted after some review. If the connector is "Partner-support" or "Filigran-support", a dev team make take over but will base its work on your PR, speeding the process. It will be much appreciated.