Refactor: Align Holdout implementation with Swift SDK#472

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muzahidul-opti wants to merge 12 commits intomasterfrom

Commits on Dec 15, 2025

Refactor: Align Holdout implementation with Swift SDK

muzahidul-opti
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claude
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Fix: Always evaluate holdouts for every feature (align with Swift SDK)

muzahidul-opti
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claude
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Refactor: Align get_variations_for_feature_list with Swift SDK

muzahidul-opti
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claude
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Test: Add comprehensive holdout test scenarios aligned with Swift SDK
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Fix holdout variations to use dict format for Swift SDK alignment
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Fix config tests for holdout entity changes
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Add rollout decision logging for test compatibility
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Fix user profile tracking in get_variation_for_feature
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Fix holdout initialization for missing includedFlags/excludedFlags
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Fix holdout variation lookup in impression event creation
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Fix event payload to handle holdout dict variations
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Fix holdout priority order - global holdouts take precedence
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