Noisy log when webhook cannot be delivered

[esune]

When an agent is set-up to deliver webhooks to one (or more) endpoints, it will throw an exception and print a full stack trace error if the endpoint cannot be resolved/contacted.

Example:

2024-07-23 21:55:11,754 aries_cloudagent.transport.outbound.manager ERROR Outbound message could not be delivered to http://my-controller-url.example/topic/present_proof/
Traceback (most recent call last):
File "/usr/local/lib/python3.9/asyncio/tasks.py", line 256, in __step
result = coro.send(None)
File "/home/aries/.venv/lib/python3.9/site-packages/aries_cloudagent/transport/outbound/http.py", line 84, in handle_message
raise OutboundTransportError(
aries_cloudagent.transport.outbound.base.OutboundTransportError: Unexpected response status 404, caused by: NOT FOUND

This does not prevent the agent from continuing its operation correctly, a better behaviour would be to log a WARNING statement without a stack trace.