feat(workflows): add push subscription functionality

[havenbarnes]

💡 Motivation and Context

💚 How did you test it?

📝 Checklist

• I reviewed the submitted code.
• I added tests to verify the changes.
• I updated the docs if needed.
• No breaking change or entry added to the changelog.

If releasing new changes

• Ran pnpm changeset to generate a changeset file
• Added the "release" label to the PR to indicate we're publishing new versions for the affected packages

[github-actions]

posthog-android Compliance Report

Date: 2026-03-31 16:50:15 UTC
Duration: 176ms

✅ All Tests Passed!

0/0 tests passed

---