feat: forward openai error details (#5) (#6)

* Handle OpenAI errors.

(cherry picked from commit 7f766340d77a31ba9670580e5e4d1205c8a326fd)

* Fixes OpenAI error handling.

(cherry picked from commit 1c5d212c092cb234c9072d7edd9032e4b4178e2e)

aidial_assistant/application/__init__.py

@@ -0,0 +1,3 @@
+import logging
+
+logger = logging.getLogger(__name__)

aidial_assistant/application/assistant_application.py

@@ -1,11 +1,13 @@
 from pathlib import Path
 
+from aidial_sdk import HTTPException
 from aidial_sdk.chat_completion.base import ChatCompletion
 from aidial_sdk.chat_completion.request import Addon, Request
 from aidial_sdk.chat_completion.response import Response
 from aiohttp import hdrs
-from openai import InvalidRequestError
+from openai import InvalidRequestError, OpenAIError
 
+from aidial_assistant.application import logger
 from aidial_assistant.application.args import parse_args
 from aidial_assistant.application.prompts import (
     MAIN_SYSTEM_DIALOG_MESSAGE,
@@ -112,7 +114,16 @@ async def chat_completion(
         )
         with response.create_single_choice() as choice:
             callback = ServerChainCallback(choice)
-            await chain.run_chat(history, callback, usage_publisher)
+            try:
+                await chain.run_chat(history, callback, usage_publisher)
+            except OpenAIError as e:
+                logger.exception("Request processing has failed.")
+                raise HTTPException(
+                    str(e),
+                    status_code=e.http_status or 500,
+                    code=e.code,
+                )
+
             choice.set_state(callback.state)
 
         response.set_usage(