feat: Track costs for streaming with OpenAI

[tvj15]

Made changes as discussed on #214.

Now, the user when iterating through the stream can check if cost exists like this:

from mirascope.openai import OpenAICall

class BookRecommender(OpenAICall):
    prompt_template = "Please recommend a {genre} book."

    genre: str


stream = BookRecommender(genre="fantasy").stream()
for chunk in stream:
    print(chunk.content, end="")
    if chunk.cost:
        print(chunk.cost)

[brenkao]

Changes look good! can you update https://docs.mirascope.io/latest/concepts/tracking_costs_for_llm_providers/#cost-tracking-for-streaming to reflect your new updates?

[tvj15]

Changes look good! can you update https://docs.mirascope.io/latest/concepts/tracking_costs_for_llm_providers/#cost-tracking-for-streaming to reflect your new updates?

Sure!

[willbakst]

Great work! Thank you for contributing 🙏

[willbakst]

@tvj15 can you please merge in current dev? I made a change to the GitHub action for codecov that will hopefully resolve the rate limit failures.

[willbakst]

This closes #214

@tvj15 I tried merging dev into your branch, but I'm running into issues. Did you make sure to check the box for allowing maintainers to submit changes? Wondering if that was un-checked or if there's a separate issue happening.

[tvj15]

This closes #214

@tvj15 I tried merging dev into your branch, but I'm running into issues. Did you make sure to check the box for allowing maintainers to submit changes? Wondering if that was un-checked or if there's a separate issue happening.

Yes it is turned on. I am not sure of the issue. Shall I raise a new PR into dev?

[willbakst]

Hmm, probably an issue on my end then.

For now, can you just merge dev into this PR so I can re-run the workflows?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (13e722d) to head (2ff3640).
Report is 12 commits behind head on dev.

Additional details and impacted files

@@            Coverage Diff             @@
##               dev      #282    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files          138       138            
  Lines         6802      6927   +125     
==========================================
+ Hits          6802      6927   +125     

Flag	Coverage Δ
tests	100.00% <100.00%> (ø)

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