Improve Litellm proxy related error handling

[lickem22]

Reviewer: @poornimaramesh
Estimate: 20 mins

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Ticket

Fixes: AAQ-896

Description

Goal

The goal of this PR is to improve error handling, so we don't show 500 errors when there are LiteLLM related errors

Changes

The following changes have been made:

• Created two Custom errors LLMCallException, EmbeddingCallException.
• Updated contents and question_answers routers to raise a 503 error when these exceptions are caught.
• Quick frontend fixes

Future Tasks (optional)

How has this been tested?

To-do before merge (optional)

Checklist

Fill with x for completed.

• My code follows the style guidelines of this project
• I have reviewed my own code to ensure good quality
• I have tested the functionality of my code to ensure it works as intended
• I have resolved merge conflicts

[poornimaramesh]

Tested and works well thanks!

I did spot another unrelated error though: every time I try to put in a string tag in the content card it errored out with the following error.

sqlalchemy.exc.ProgrammingError: (sqlalchemy.dialects.postgresql.asyncpg.ProgrammingError) <class 'asyncpg.exceptions.UndefinedFunctionError'>: operator does not exist: integer = character varying
HINT:  No operator matches the given name and argument types. You might need to add explicit type casts.
[SQL: SELECT tag.created_datetime_utc, tag.tag_id, tag.tag_name, tag.updated_datetime_utc, tag.workspace_id 
FROM tag 
WHERE tag.workspace_id = $1::INTEGER AND tag.tag_id IN ($2::VARCHAR)]
[parameters: (1, 'string')]
(Background on this error at: https://sqlalche.me/e/20/f405)

I think it's happening because the pydantic class ContentCreate seems to take lists of strings for content tags, but validate_tags needs the tags to be integers.

[lickem22]

Tested and works well thanks!

I did spot another unrelated error though: every time I try to put in a string tag in the content card it errored out with the following error.

sqlalchemy.exc.ProgrammingError: (sqlalchemy.dialects.postgresql.asyncpg.ProgrammingError) <class 'asyncpg.exceptions.UndefinedFunctionError'>: operator does not exist: integer = character varying
HINT:  No operator matches the given name and argument types. You might need to add explicit type casts.
[SQL: SELECT tag.created_datetime_utc, tag.tag_id, tag.tag_name, tag.updated_datetime_utc, tag.workspace_id 
FROM tag 
WHERE tag.workspace_id = $1::INTEGER AND tag.tag_id IN ($2::VARCHAR)]
[parameters: (1, 'string')]
(Background on this error at: https://sqlalche.me/e/20/f405)

I think it's happening because the pydantic class ContentCreate seems to take lists of strings for content tags, but validate_tags needs the tags to be integers.

Hi @poornimaramesh,

Thanks for catching that. But I am struggling to recreate that error on my end. If you don't mind I will merge this and we can huddle on that later