Method record_cache_hit

src/cache/enhanced_statement_pool.rs:365–375

Record a cache hit and update access statistics

(&self, cache_key: &str)

    /// Record a cache hit and update access statistics
    fn record_cache_hit(&self, cache_key: &str) {
        let mut statements = self.statements.write().unwrap();
        if let Some(entry) = statements.get_mut(cache_key) {
            entry.access_count += 1;
            entry.last_used = Instant::now();
        }

        let mut stats = self.stats.write().unwrap();
        stats.cache_hits += 1;
        stats.average_hit_rate = stats.cache_hits as f64 / stats.total_queries as f64;
    }

    /// Evict the least valuable entry from the cache
    fn evict_least_valuable(&self, statements: &mut HashMap<String, CachedStatementEntry>) {