Perf/redis auth cache#46
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Replace 2 Postgres queries per request with a Redis cache lookup.
Cache key: session:{session_id} → MobileSessionCache JSON.
Graceful fallback to Postgres when cache miss. Cache is populated
on login and invalidated on user block/delete.
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Cache mobile sessions in Redis to reduce database load
Description
Optimizes mobile user authentication by caching active sessions in Redis, avoiding PostgreSQL queries on every authenticated request.
Changes
MobileSessionCacheschema in the session service.get_current_mobile_userdependency to retrieve session info from Redis first, falling back to PostgreSQL only on cache miss.