Clarify One-Time Event metrics UI display

[devin-ai-integration]

Clarify One-Time Event metrics UI display

Problem

Users are confused when they set up metrics as "One-Time Event" but see them displayed as "daily-participation" in experiment review mode.

Solution

Updated documentation to clarify that:

1. All unit count metrics have aggregation "daily_participation" in the UI
2. One-Time Event metrics are differentiated by their rollup property (max)
3. This behavior is intentional based on how metrics are configured in Statsig's data modeling

Changes

• Added clarification to the Time Window section in metrics/create.md
• Added a new FAQ entry in metrics/pulse.md addressing this specific question

Link to Devin run

https://app.devin.ai/sessions/9b4eae2abcfb4bba89457c2a05a14826

Requested by

[email protected]

[devin-ai-integration]

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[jasonwzm]

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