Migrates our analytics integration on Cloud from PostHog to Amplitude.
This change updates the core AnalyticsHelper class to use the Amplitude
SDK while maintaining the same tracking interface. Rest of all existing
analytics calls throughout the codebase continue to work without
modification.
**Changes:**
- Replace PostHog analytics with Amplitude SDK
- Rename ANALYTICS_TOKEN to CLOUD_ANALYTICS_TOKEN for clarity
- Fix bug in page() method signature that was causing malformed payloads
- Replace June.so analytics with PostHog integration
- Maintain existing analytics API interface for seamless migration
- Remove all the June references
_June.so is shutting down their service, requiring migration to an
alternative analytics provider. PostHog was chosen as the replacement
due to its robust feature set and similar API structure._
Fixes
https://chatwoot-p3.sentry.io/share/issue/aa6a3c0accb345e984ed80eaddc3efd5/
In the case where the user is redirected to the page from a redirect
like google login, the analytics helper breaks. This PR fixes it by
checking if the user is present.
This does not break the user email tracking since the user is redirected
anyway and the `AnalyticsHelper` is reinitialised
