* PremiumRank System for TrinityCore 3.3.5a (WotLK) Beta Test !!
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* Optimizations & Fixes:
* 1. Uses Read-Write lock performance (High concurrency).
* 2. Deadlock prevention: Removes heavy logic (ApplyBenefits, Chat) from locks.
* 3. Database Safety: Verifies DB write immediately after saving.
* 4. Item Safety: Item is consumed ONLY after successful DB commit.
* 5. Cache Consistency: Strict synchronization between FastCache and MainCache.
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Update Trial for 1.5H test