POST /api/v2/sheets/query - Query with 100ms batching & deduplication
POST /api/v2/sheets/update - Update with unified scheduler (INSERT/UPDATE/UPSERT)
POST /api/v2/sheets/remove - Delete with race-free execution ⭐ V2.3.1
POST /api/v2/sheets/revalidate - Clear cache for specific sheet ⭐ V2.3.2
POST /api/v2/sheets/reload - Clear all V2 caches ⭐ V2.3.2