feat(ai): persist hint usage and difficulty analytics (BA-081) - #745
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MaryammAli merged 2 commits intoAug 29, 2026
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…Dash-Studios#649) - Track hint usage durably, keyed by userId:hintId (deduplicated per user) - Persist records to Redis under hint:usage:... and unique-user sets under hint:users:... - Add getHintUsageAnalytics() aggregating totalUses, uniqueUsers, usesByHint, usesByDifficulty - Mirror Redis state into a fresh service instance so counts survive restarts - Expose GET /ai/hints/analytics endpoint - Add unit tests for dedup, user-scoping, difficulty distribution, and restart durability
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Closes #649. Durable, user-scoped, deduplicated hint usage analytics with a REST endpoint and tests. Authored as BobbyRichie2.