fix: add stream_usage true to collect token usage

[k11kirky]

Problem

If streaming = True in our ChatOpenAI models, we need to also include stream_usage = true to collect tokens

[sentry-io]

🔍 Existing Issues For Review

Your pull request is modifying functions with the following pre-existing issues:

📄 File: ee/hogai/summarizer/nodes.py

Function	Unhandled Issue
run	ValueError: Can only run summarization with a visualization message as the last one in the state ... Event Count: 13
run	ValueError: Can only run summarization with a visualization message as the last one in the state /api/env... Event Count: 13
run	KeyError: 'results' /api/environments/{parent_loo... Event Count: 4
run	KeyError: 'results' ee.hogai.summarizer.nodes in run Event Count: 4

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