Publish ApplicationEvents for cache operations

[senocak]

This PR introduces ApplicationEvent publishing for cache write operations (put, evict, clear) in Spring's caching infrastructure. Currently, Spring's cache abstraction provides no mechanism to observe or react to cache mutations triggered by @Cacheable, @CachePut, and @CacheEvict annotations.

Spring's cache infrastructure intercepts annotated methods and performs cache operations, but:

• No events are published when an entry is inserted, updated, or evicted
• No method-level context is available to cache decorators or wrappers
• No hooks exist for reactive or asynchronous side effects after cache mutations

Modified Classes

• CacheAspectSupport: Holds an optional ApplicationEventPublisher, publishes events after successful doPut(), doEvict(), and doClear() calls in performCachePut() and performCacheEvicts().
• CacheInterceptor: Implements ApplicationEventPublisherAware to receive the publisher from the ApplicationContext.

All existing cache interceptor tests continue to pass. If no ApplicationEventPublisher is available (e.g., AspectJ mode), events are silently skipped. Existing Cache, CacheManager, and configuration interfaces are unchanged.