feat: Add LLM integration usage to organization reports

[Lior539]

Problem

We want to know which companies are using our LLM integrations in PostHog. Currently, there's no way to do this

Changes

Add the following fields to the organization_usage_report

• event_count_from_helicone_in_period
• event_count_from_langfuse_in_period
• event_count_from_keywords_ai_in_period
• event_count_from_traceloop_in_period

Does this work well for both Cloud and self-hosted?

No impact

How did you test this code?

Added tests + ran pytest posthog/tasks/test/test_usage_report.py

[raquelmsmith]

I'm really sorry but I'm nervous about this being 4 extra big queries across the events table. I will look tomorrow to see if I can do a rollup. If not I will merge this and hope it's okay.

[Lior539]

@raquelmsmith with the help of ChatGPT I managed to combine it into a single query. Let me know if this looks better!

[raquelmsmith]

Nice work with this! Thank you for taking it on 🙏 One suggestion for clarity, one question, and the type annotation should be fixed. but otherwise looks great 🙌

[raquelmsmith]

@Lior539 can you fix the code quality check failures?

[Lior539]

@raquelmsmith fixed the code quality checks :)