Returns information about the current cache state, including number of cached items and configuration settings.
Value
A list with cache statistics:
enabled - Whether caching is enabled
search_count - Number of cached search results
range_count - Number of cached year-range searches
detail_count - Number of cached thesis details
search_ttl - Search cache TTL in seconds (NULL = session)
detail_ttl - Detail cache TTL in seconds (NULL = session)
