[bug] Guards that dont exist in settings.use_remote = True dont error and openAI api error for guard not found not helpful

[dtam]

Describe the bug
A clear and concise description of what the bug is.
no guard when using the server should be easier to figure out

To Reproduce

from guardrails import settings

settings.use_remote = True
Guard(name="basic")(
    model="gpt-4o-mini",
    messages=[{
        "role": "system",
        "content": "Welcome to the OpenAI chatbot! How can I help you today?"
    }]
)

should error if the guard isnt found

# Next, we created a Guarded endpoint that uses the hallucination validator:
guarded_client = OpenAI(
    api_key=openai_api_key,
    base_url="http://127.0.0.1:8000/guards/basic/openai/v1/"
)

guarded_client.chat.completions.create(
    model="gpt-4o-mini",
    messages=[{
        "role": "system",
        "content": "Welcome to the OpenAI chatbot! How can I help you today?"
    }]
)

errors in an arcane server 500

Expected behavior
should be easier to figure out

Library version:
Version (0.5.X)

Additional context
Add any other context about the problem here.

[dtam]

#1016
guardrails-ai/guardrails-api#67

[dtam]

this was addressed in 0.5.5