fix(cohorts): Fix all events action with cohorts

[timgl]

Problem

Cohorts that have an action with "all events" selected returns 0 people

Changes

Fix that

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Does this work well for both Cloud and self-hosted?

How did you test this code?

[greptile-apps]

PR Summary

Fixed an issue where cohorts with an "all events" action were returning 0 people by modifying the event condition logic in the SQL query generation.

• Modified _get_behavior_subquery() in foss_cohort_query.py to only add event filtering when specific events are defined
• Added test case test_cohortpeople_action_all_events to verify cohorts match any event when no specific event is defined
• Ensures cohort queries now correctly include people who performed any event within the specified time window
• Maintains existing behavior for cohorts with specific event filters
• Simple fix that addresses the core issue without introducing complexity

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[anirudhpillai]

💯