feat: add PostHog JavaScript and Python providers

[jonathannorris]

Summary

• Add PostHog's official Node.js OpenFeature provider.
• Add PostHog's official browser OpenFeature provider.
• Add PostHog's official Python OpenFeature provider.

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[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 6676966d-39f5-4866-b10b-60524ce2bc75

📥 Commits

Reviewing files that changed from the base of the PR and between 3676bfb and 28372cb.

📒 Files selected for processing (1)

• src/datasets/providers/posthog.ts

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📝 Walkthrough

Walkthrough

The provider dataset now lists official PostHog integrations for JavaScript server, JavaScript client, and Python server environments.

Changes

PostHog provider registrations

Layer / File(s)	Summary
PostHog provider metadata src/datasets/providers/posthog.ts	Added entries for the JavaScript server, JavaScript client, and Python server providers with links to their PostHog repositories.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Mergeability Score: ⚪ Minimal · up to 28372

This localized provider-registration change has no actionable merge-blocking risk remaining and is merge-ready after normal checks and review.

Possibly related PRs

• open-feature/openfeature.dev#1410: Adds provider entries to the same provider dataset using the same registration pattern.

Suggested reviewers: aepfli

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly summarizes the addition of PostHog JavaScript and Python providers.
Description check	✅ Passed	The description directly matches the changeset and lists the Node.js, browser, and Python providers.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
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