feat: add analytics_event trigger

[tyiuhc]

Summary

Support analytics_event page trigger, fired when a event is tracked with matching:

1. event_type
2. event_properties

This will require either:

1. the web experiment plugin to be added to the Amplitude Analytics SDK, or;
2. trackEvent to be called when a relevant event is fired.

Checklist

• Does your PR title have the correct title format?
• Does your PR have a breaking change?: No

[macroscopeapp]

Add analytics_event trigger by emitting bus events from DefaultWebExperimentClient.trackEvent and an Amplitude enrichment plugin in experiment.ts

Introduce DefaultWebExperimentClient.trackEvent to publish analytics_event messages and add an Amplitude enrichment plugin that forwards SDK events to the message bus; update SubscriptionManager.isPageObjectActive to evaluate conditions for analytics_event with URL, name, and properties; adjust event property typing to Record<string, unknown>.

📍Where to Start

Start with the plugin and trackEvent implementations in experiment.ts, then review SubscriptionManager.isPageObjectActive in subscriptions.ts for trigger evaluation.

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📊 Macroscope summarized 5a2960e. 3 files reviewed, 2 issues evaluated, 2 issues filtered, 0 comments posted. View details

[promptless]

📝 Documentation updates detected!

Updated existing suggestion: Document new page trigger types for Web Experiment

[stephen-choi-amplitude]

Just want to double check: Shouldn't it check the trigger value?

[tyiuhc]

All the event-related + URL targeting conditions should be within conditions in PageObject.

[stephen-choi-amplitude]

Can you elaborate? My understanding of conditions is that it only refers to the URL page targeting rules and not events.