OpenAI: Instrument chat completions

[kaylareopelle]

Gem method: OpenAI::Client#chat
OpenAI Chat Completions Documentation
OpenAI Chat Completions API Reference

• Create span when method is called if there’s a current transaction; Span name: Llm/completion/OpenAI/Create
• Generate metric when method is called: Metric name: Ruby/ML/OpenAI/<version>
• Create custom event LlmChatCompletionSummary (example attributes)(Internal)
• Create custom event LlmChatCompletionMessage (example attributes)(Internal)

Notes:

• There’s a deprecated API called completions. That’s not what we’re talking about. We’re talking about “chat completions”, which is accessed in the Ruby gem through OpenAI::Client#chat
• Using the chat completions example linked above, the output should be one summary event and five message events. Four of the message events come from the request and one of the message events comes from the response.
• Summary events and messages events should be created as part of the same unit of work because they are both derived from the OpenAI::Client#chat method.

[workato-integration]

https://new-relic.atlassian.net/browse/NR-217610

[kaylareopelle]

Closed by #2398