feat(experimentation): add experiment exposures model, warehouse query and summary builder#7740

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gagantrivedi merged 16 commits into

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feat/experiment-exposure-snapshots

Jun 11, 2026

Commits on Jun 10, 2026

feat(experimentation): add exposure snapshot model, warehouse query and payload mapper
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docs(experimentation): regenerate events catalogue
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refactor(experimentation): rename exposure units to first_exposed_identities
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docs(experimentation): tighten ExposureBucket docstring
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refactor(experimentation): drop exposure timestamp extremes from bucket rows
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refactor(experimentation): drop redundant window_start from exposure snapshots
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refactor(experimentation): replace exposure snapshots with one updatable row per experiment
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refactor(experimentation): address design review findings
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refactor(experimentation): pin exposure bucket boundaries to UTC in the query
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refactor(experimentation): drop derivable share from the exposures payload
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refactor(experimentation): replace mapper TypedDicts with summary dataclasses
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refactor(experimentation): collapse variant summaries to an identities-by-variant mapping
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